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Номер 771, страница 193 - гдз по геометрии 7 класс учебник Мерзляк, Полонский
Авторы: Мерзляк А. Г., Полонский В. Б., Якир М. С.
Тип: Учебник
Издательство: Просвещение, Вентана-граф
Год издания: 2023 - 2026
Цвет обложки: оранжевый с графиком
ISBN: 978-5-09-105805-5
Популярные ГДЗ в 7 классе
Упражнения для повторения курса геометрии 7 класса. Треугольники - номер 771, страница 193.
App\Models\Task {#1030 // resources/views/models/task/default.blade.php #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600531 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/771" "field_display_title" => "771" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037 #items: array:1 [ 0 => App\Models\Term {#1036 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #original: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1046 #items: array:1 [ 0 => App\Models\Branch {#1045 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 599563 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Упражнения для повторения курса геометрии 7 класса" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1047 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "191" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1084 #items: array:1 [ 0 => App\Models\Book {#1048 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 904 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1050 #items: array:2 [ 0 => App\Models\Term {#1049 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6477 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Геометрия" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "geometrija" ] #original: array:10 [ "id" => 6477 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Геометрия" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "geometrija" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1051 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6484 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Математика" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "matematika" ] #original: array:10 [ "id" => 6484 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Математика" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "matematika" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1052 #items: array:1 [ 0 => App\Models\Term {#1053 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5456 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "7" "field_cases" => array:6 [ …6] "field_translit" => "sedmoj" ] #original: array:6 [ "id" => 5456 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "7" "field_cases" => array:6 [ …6] "field_translit" => "sedmoj" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publisher" => Illuminate\Database\Eloquent\Collection {#1054 #items: array:2 [ 0 => App\Models\Term {#1055 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #original: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1056 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5174 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Вентана-граф" "field_cases" => null "field_translit" => "ventana-graf" ] #original: array:6 [ "id" => 5174 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Вентана-граф" "field_cases" => null "field_translit" => "ventana-graf" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author" => Illuminate\Database\Eloquent\Collection {#1057 #items: array:3 [ 0 => App\Models\Term {#1058 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5164 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Мерзляк" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Аркадий" "field_patronymic" => "Григорьевич" "field_surname_rp" => null ] #original: array:12 [ "id" => 5164 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Мерзляк" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Аркадий" "field_patronymic" => "Григорьевич" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1059 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5506 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Полонский" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Виталий" "field_patronymic" => "Борисович" "field_surname_rp" => null ] #original: array:12 [ "id" => 5506 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Полонский" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Виталий" "field_patronymic" => "Борисович" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Term {#1060 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 6445 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Якир" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Михаил" "field_patronymic" => "Семёнович" "field_surname_rp" => null ] #original: array:12 [ "id" => 6445 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Якир" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Михаил" "field_patronymic" => "Семёнович" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1061 #items: [] #escapeWhenCastingToString: false } "field_book_type" => Illuminate\Database\Eloquent\Collection {#1062 #items: array:1 [ 0 => App\Models\Term {#1063 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ …6] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #original: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ …6] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_country" => Illuminate\Database\Eloquent\Collection {#1064 #items: array:1 [ 0 => App\Models\Term {#1065 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ …6] "field_translit" => "rossiya" ] #original: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ …6] "field_translit" => "rossiya" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_city" => Illuminate\Database\Eloquent\Collection {#1066 #items: array:1 [ 0 => App\Models\Term {#1067 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ …6] "field_translit" => "moskva" ] #original: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ …6] "field_translit" => "moskva" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_series" => Illuminate\Database\Eloquent\Collection {#1068 #items: [] #escapeWhenCastingToString: false } "field_umk" => Illuminate\Database\Eloquent\Collection {#1069 #items: [] #escapeWhenCastingToString: false } "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1070 #items: [] #escapeWhenCastingToString: false } "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1071 #items: array:2 [ 0 => App\Models\Term {#1072 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 25 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (новый)" "field_cases" => array:6 [ …6] "field_color" => "красный" "field_end_year" => "2027" "field_start_year" => "2023" "field_translit" => "fgos" "field_type" => "новый" ] #original: array:10 [ "id" => 25 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (новый)" "field_cases" => array:6 [ …6] "field_color" => "красный" "field_end_year" => "2027" "field_start_year" => "2023" "field_translit" => "fgos" "field_type" => "новый" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1073 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ …6] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #original: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ …6] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1074 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1075 #items: array:1 [ 0 => App\Models\Term {#1076 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 6790 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Подольский" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "В" "field_patronymic" => "Е" "field_surname_rp" => "Подольского" ] #original: array:12 [ "id" => 6790 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Подольский" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "В" "field_patronymic" => "Е" "field_surname_rp" => "Подольского" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_under_the_edition_degree" => null "field_cover_description" => "с графиком" "field_publication_year" => "2023" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебное пособие" "field_allowed" => null "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1017" "field_priority" => "6" "field_default_folder" => "/geometrija_07/merzlyak-u23/" "field_isbn" => "978-5-09-105805-5" "field_cover" => array:1 [ 0 => "/media/geometrija_07/merzlyak-u23/covers/cover1.webp?ts=1738008352" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/geometrija_07/merzlyak-u23/covers/cover1.webp?ts=1738008352" "alt" => "" "width" => "2277" "height" => "3035" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1077 #items: [] 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"field_translit" => "oranzhevyy" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => "<!--Текст в низу страницы--> <h2>Нужно ли изучать геометрию? </h2> <p> В седьмом классе учебные нагрузки возрастут. В расписании школьников появится такой предмет как геометрия. Поначалу новая наука вызывает искренний интерес, но уже через некоторое время ребята начинают испытывать трудности при ее освоении. Многие пытаются мотивировать нежелание делать уроки высказываниями вроде: «Да зачем она нужна?», «В жизни такое точно не пригодится», и т.д. Тем не менее оценки по предмету самым прямым образом влияют на общую успеваемость. С помощью «<strong>ГДЗ по Геометрии 7 класс Учебник Мерзляк, Полонский, Якир (Вентана-Граф)</strong>» можно разобраться в аспектах дисциплины и осознать ее смысл. </p> <p> Давайте рассмотрим, какие качества позволяет развить геометрия у учеников: <ol> <li>Логическое, образное мышление.</li> <li>Пространственное представление.</li> <li>Интуитивную и символическую умственную деятельность.</li> <li>Фантазию.</li> <li>Умение анализировать.</li> <li>Грамотную речь.</li> </ol> <p> Основное, что требуется от учащихся на уроках - внимательность. Иначе будет трудно понять, каким образом знание теорем поможет справиться с выполнением задач. Геометрия - наука сугубо практическая, поэтому учителя показывают наглядные примеры во время занятий. Но иногда у подростков все равно остаются вопросы, ответить на которые зачастую некому. Решебник позволит полноценно освоить новую тему и приобрести важные навыки. </p> <h2> Почему ученики выбирают ГДЗ к учебнику Мерзляка? </h2> <p> Учебники подчас содержат очень мало полезных сведений. Возникает ощущение, что авторы этих пособий сосредоточены только на написании разнообразных задач. Поэтому основную информацию по теории школьники получают от преподавателя. Но всегда могут возникнуть непредвиденные ситуации, например, ребенок заболел или не понял объяснения, даже просто отвлекся. Необходимо тщательно разобрать все упущенное, чтобы не потеряться потом в водовороте новых данных. Отличным помощником в этом деле станет <strong>сборник ответов по геометрии к учебнику Мерзляка за 7 класс</strong>. </p> <p> Подростки все чаще отдают предпочтение этому сборнику, так как: <ol> <li>в нем все понятно изложено;</li> <li>с его помощью выполнение домашних заданий отнимает всего несколько минут;</li> <li>можно исправить недочеты, до того как учитель увидит тетрадь;</li> <li>есть понятные наглядные примеры и подробные ответы, позволяющие сразу разобраться в сути вопроса.</li> </ol> <p> Заниматься с решебником можно в любое удобное время, так что учащиеся сами строят график работы, не зависят при этом от внешних условий. При этом есть постоянная возможность повторить ранее пройденные параграфы, что позволит хорошо подготовиться к контрольным и освежить память. Некоторые ребята заглядывают в пособие прямо на перемене, чем обеспечивают себе твердую пятерку на уроке. </p> <h2> Действительно ли онлайн-решебник помогает? </h2> <p> Многие взрослые беспокоятся, правда ли <strong>онлайн ответы по геометрии 7 класс к учебнику Мерзляка А. Г. (Вентана-Граф)</strong>» могут помочь детям или это просто очередная шпаргалка, которой они пользуются, лишь бы не учиться? Все зависит от подхода самих школьников. Естественно, есть ребята, которые начинают списывать с электронного пособия готовые решения. 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В расписании школьников появится такой предмет как геометрия. Поначалу новая наука вызывает искренний интерес, но уже через некоторое время ребята начинают испытывать трудности при ее освоении. Многие пытаются мотивировать нежелание делать уроки высказываниями вроде: «Да зачем она нужна?», «В жизни такое точно не пригодится», и т.д. Тем не менее оценки по предмету самым прямым образом влияют на общую успеваемость. С помощью «<strong>ГДЗ по Геометрии 7 класс Учебник Мерзляк, Полонский, Якир (Вентана-Граф)</strong>» можно разобраться в аспектах дисциплины и осознать ее смысл. </p> <p> Давайте рассмотрим, какие качества позволяет развить геометрия у учеников: <ol> <li>Логическое, образное мышление.</li> <li>Пространственное представление.</li> <li>Интуитивную и символическую умственную деятельность.</li> <li>Фантазию.</li> <li>Умение анализировать.</li> <li>Грамотную речь.</li> </ol> <p> Основное, что требуется от учащихся на уроках - внимательность. 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Отличным помощником в этом деле станет <strong>сборник ответов по геометрии к учебнику Мерзляка за 7 класс</strong>. </p> <p> Подростки все чаще отдают предпочтение этому сборнику, так как: <ol> <li>в нем все понятно изложено;</li> <li>с его помощью выполнение домашних заданий отнимает всего несколько минут;</li> <li>можно исправить недочеты, до того как учитель увидит тетрадь;</li> <li>есть понятные наглядные примеры и подробные ответы, позволяющие сразу разобраться в сути вопроса.</li> </ol> <p> Заниматься с решебником можно в любое удобное время, так что учащиеся сами строят график работы, не зависят при этом от внешних условий. При этом есть постоянная возможность повторить ранее пройденные параграфы, что позволит хорошо подготовиться к контрольным и освежить память. Некоторые ребята заглядывают в пособие прямо на перемене, чем обеспечивают себе твердую пятерку на уроке. </p> <h2> Действительно ли онлайн-решебник помогает? </h2> <p> Многие взрослые беспокоятся, правда ли <strong>онлайн ответы по геометрии 7 класс к учебнику Мерзляка А. Г. (Вентана-Граф)</strong>» могут помочь детям или это просто очередная шпаргалка, которой они пользуются, лишь бы не учиться? Все зависит от подхода самих школьников. Естественно, есть ребята, которые начинают списывать с электронного пособия готовые решения. 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класса" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1126} "field_page_start" => "191" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1127} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1128} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Branch {#1129 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 599565 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Треугольники" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "191" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1131 #items: array:1 [ 0 => App\Models\Book {#1048} ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1132 #items: array:1 [ 0 => App\Models\Branch {#1045} ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 599565 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Треугольники" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130} "field_page_start" => "191" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1131} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1132} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1038 #items: array:4 [ 0 => App\Models\Element {#1106 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 744863 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1096 #items: array:1 [ 0 => App\Models\Edition {#1103 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1662 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие 2023" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1104 …2} "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "margarita" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1101 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_content_source" => null ] #original: array:21 [ "id" => 1662 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие 2023" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1104 …2} "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "margarita" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1101 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "600531" "type" => "task" ] "text" => "<p><strong>771.</strong> На рисунке 389 $AM = CN$, $AB = CD$, $BN = DM$. Докажите, что</p><p>$\angle ABN = \angle CDM.$</p><p>Рис. 389</p>" "img" => array:2 [ 0 => array:5 [ "name" => "771-1.jpg" "alt" => null "width" => "1619" "height" => 189 "path" => "/media/geometrija_07/merzlyak-u23/0-00/771-1.webp?ts=1738080699" ] 1 => array:5 [ "name" => "771-2.jpg" "alt" => null "width" => "852" "height" => 735 "path" => "/media/geometrija_07/merzlyak-u23/0-00/771-2.webp?ts=1738080699" ] ] ] #original: array:7 [ "id" => 744863 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1096} "task" => array:2 [ "refs" => "600531" "type" => "task" ] "text" => "<p><strong>771.</strong> На рисунке 389 $AM = CN$, $AB = CD$, $BN = DM$. Докажите, что</p><p>$\angle ABN = \angle CDM.$</p><p>Рис. 389</p>" "img" => array:2 [ 0 => array:5 [ "name" => "771-1.jpg" "alt" => null "width" => "1619" "height" => 189 "path" => "/media/geometrija_07/merzlyak-u23/0-00/771-1.webp?ts=1738080699" ] 1 => array:5 [ "name" => "771-2.jpg" "alt" => null "width" => "852" "height" => 735 "path" => "/media/geometrija_07/merzlyak-u23/0-00/771-2.webp?ts=1738080699" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Element {#1098 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 750382 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1090 #items: array:1 [ 0 => App\Models\Edition {#1099 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1665 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 3 (2023)" "field_order" => "4" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1094 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "margarita" "field_edition_type" => "solution" "field_root_dir" => "3-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1093 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_content_source" => null ] #original: array:21 [ "id" => 1665 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 3 (2023)" "field_order" => "4" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1094 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "margarita" "field_edition_type" => "solution" "field_root_dir" => "3-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1093 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "600531" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "771-1.png" "alt" => null "width" => "1400" "height" => 1042 "path" => "/media/geometrija_07/merzlyak-u23/3-00/771-1.webp?ts=1738086022" ] ] ] #original: array:6 [ "id" => 750382 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1090} "task" => array:2 [ "refs" => "600531" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "771-1.png" "alt" => null "width" => "1400" "height" => 1042 "path" => "/media/geometrija_07/merzlyak-u23/3-00/771-1.webp?ts=1738086022" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Element {#1092 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 751372 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1043 #items: array:1 [ 0 => App\Models\Edition {#1091 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1667 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 5 (2023)" "field_order" => "6" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1088 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "margarita" "field_edition_type" => "solution" "field_root_dir" => "5-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1087 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1083 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_content_source" => null ] #original: array:21 [ "id" => 1667 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 5 (2023)" "field_order" => "6" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1088 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "margarita" "field_edition_type" => "solution" "field_root_dir" => "5-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1087 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1083 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "600531" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "771-1.png" "alt" => null "width" => "473" "height" => 608 "path" => "/media/geometrija_07/merzlyak-u23/5-00/771-1.webp?ts=1738086837" ] ] ] #original: array:6 [ "id" => 751372 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1043} "task" => array:2 [ "refs" => "600531" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "771-1.png" "alt" => null "width" => "473" "height" => 608 "path" => "/media/geometrija_07/merzlyak-u23/5-00/771-1.webp?ts=1738086837" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 3 => App\Models\Element {#1040 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1441924 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1119 #items: array:1 [ 0 => App\Models\Edition {#1041 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 5355 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 6 (2023)" "field_order" => "7" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1116 …2} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "vadim" "field_edition_type" => "solution" "field_root_dir" => "6-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1124 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1120 …2} "field_content_source" => null ] #original: array:21 [ "id" => 5355 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 6 (2023)" "field_order" => "7" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1116 …2} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "vadim" "field_edition_type" => "solution" "field_root_dir" => "6-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1124 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1120 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "600531" "type" => "task" ] "text" => "<p>Для того чтобы доказать, что $ \angle ABN = \angle CDM $, мы докажем, что треугольники $ \triangle ABN $ и $ \triangle CDM $ равны.</p><p>По условию задачи нам даны равенства двух пар сторон этих треугольников: $ AB = CD $ и $ BN = DM $. Если мы докажем, что и третьи стороны, $ AN $ и $ CM $, равны, то треугольники будут равны по третьему признаку равенства треугольников (по трем сторонам).</p><p>Рассмотрим длины отрезков $ AN $ и $ CM $. Точки A, M, C, N лежат на одной прямой. Длину отрезка $ AN $ можно представить как сумму длин отрезков $ AM $ и $ MN $, то есть $ AN = AM + MN $. Аналогично, длина отрезка $ CM $ равна сумме длин отрезков $ CN $ и $ NM $. Так как длина отрезка $ NM $ равна длине $ MN $, мы можем записать $ CM = CN + MN $.</p><p>Из условия задачи известно, что $ AM = CN $. Давайте сравним выражения для длин $ AN $ и $ CM $:</p><p>$ AN = AM + MN $</p><p>$ CM = CN + MN $</p><p>Поскольку правые части этих выражений состоят из соответственно равных слагаемых ($ AM = CN $ и $ MN = MN $), то и сами выражения равны. Таким образом, $ AN = CM $.</p><p>Теперь мы можем утверждать, что три стороны треугольника $ \triangle ABN $ соответственно равны трем сторонам треугольника $ \triangle CDM $:</p><p>$ AB = CD $ (по условию)</p><p>$ BN = DM $ (по условию)</p><p>$ AN = CM $ (доказано выше)</p><p>Следовательно, по третьему признаку равенства треугольников (по трем сторонам), $ \triangle ABN \cong \triangle CDM $.</p><p>Из равенства треугольников следует равенство их соответствующих углов. Угол $ \angle ABN $ в треугольнике $ \triangle ABN $ образован сторонами $ AB $ и $ BN $. Угол $ \angle CDM $ в треугольнике $ \triangle CDM $ образован сторонами $ CD $ и $ DM $. Так как $ AB $ соответствует $ CD $ и $ BN $ соответствует $ DM $, то углы между этими парами сторон равны.</p><p>Таким образом, $ \angle ABN = \angle CDM $, что и требовалось доказать.</p><p><strong>Ответ:</strong> Равенство $ \angle ABN = \angle CDM $ доказано, так как $ \triangle ABN \cong \triangle CDM $ по третьему признаку равенства треугольников (по трем сторонам).</p>" ] #original: array:6 [ "id" => 1441924 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1119} "task" => array:2 [ "refs" => "600531" "type" => "task" ] "text" => "<p>Для того чтобы доказать, что $ \angle ABN = \angle CDM $, мы докажем, что треугольники $ \triangle ABN $ и $ \triangle CDM $ равны.</p><p>По условию задачи нам даны равенства двух пар сторон этих треугольников: $ AB = CD $ и $ BN = DM $. Если мы докажем, что и третьи стороны, $ AN $ и $ CM $, равны, то треугольники будут равны по третьему признаку равенства треугольников (по трем сторонам).</p><p>Рассмотрим длины отрезков $ AN $ и $ CM $. Точки A, M, C, N лежат на одной прямой. Длину отрезка $ AN $ можно представить как сумму длин отрезков $ AM $ и $ MN $, то есть $ AN = AM + MN $. Аналогично, длина отрезка $ CM $ равна сумме длин отрезков $ CN $ и $ NM $. Так как длина отрезка $ NM $ равна длине $ MN $, мы можем записать $ CM = CN + MN $.</p><p>Из условия задачи известно, что $ AM = CN $. Давайте сравним выражения для длин $ AN $ и $ CM $:</p><p>$ AN = AM + MN $</p><p>$ CM = CN + MN $</p><p>Поскольку правые части этих выражений состоят из соответственно равных слагаемых ($ AM = CN $ и $ MN = MN $), то и сами выражения равны. Таким образом, $ AN = CM $.</p><p>Теперь мы можем утверждать, что три стороны треугольника $ \triangle ABN $ соответственно равны трем сторонам треугольника $ \triangle CDM $:</p><p>$ AB = CD $ (по условию)</p><p>$ BN = DM $ (по условию)</p><p>$ AN = CM $ (доказано выше)</p><p>Следовательно, по третьему признаку равенства треугольников (по трем сторонам), $ \triangle ABN \cong \triangle CDM $.</p><p>Из равенства треугольников следует равенство их соответствующих углов. Угол $ \angle ABN $ в треугольнике $ \triangle ABN $ образован сторонами $ AB $ и $ BN $. Угол $ \angle CDM $ в треугольнике $ \triangle CDM $ образован сторонами $ CD $ и $ DM $. Так как $ AB $ соответствует $ CD $ и $ BN $ соответствует $ DM $, то углы между этими парами сторон равны.</p><p>Таким образом, $ \angle ABN = \angle CDM $, что и требовалось доказать.</p><p><strong>Ответ:</strong> Равенство $ \angle ABN = \angle CDM $ доказано, так как $ \triangle ABN \cong \triangle CDM $ по третьему признаку равенства треугольников (по трем сторонам).</p>" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "600532" "type" => "task" ] "previous" => array:2 [ "refs" => "600530" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1107 #items: array:1 [ 0 => App\Models\Book {#1048} ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1039 #items: array:1 [ 0 => App\Models\BookPage {#1112 #connection: "mysql" #table: "book_pages" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 965017 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_url" => "/7-klass/geometrija/merzlyak-fgos/page-193" "field_display_title" => "193" "field_folder" => "1" "field_image_name" => "193" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1113 #items: [] #escapeWhenCastingToString: false } "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1042 #items: array:1 [ 0 => App\Models\Book {#1048} ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "edition_groups" => Illuminate\Database\Eloquent\Collection {#1118 #items: [] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1141 #items: array:1 [ 0 => App\Models\Element {#1140 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1140462 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1142 …2} "book_page" => array:2 [ …2] "img" => array:1 [ …1] ] #original: array:6 [ "id" => 1140462 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1142 …2} "book_page" => array:2 [ …2] "img" => array:1 [ …1] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "965018" "type" => "book_page" ] "previous" => array:2 [ "refs" => "965016" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1224 #items: array:8 [ 0 => App\Models\Task {#1238 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600526 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/766" "field_display_title" => "766" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1239 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1240 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1241 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1242 …2} "content" => Illuminate\Database\Eloquent\Collection {#1244 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1253 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 600526 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/766" "field_display_title" => "766" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1239 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1240 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1241 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1242 …2} "content" => Illuminate\Database\Eloquent\Collection {#1244 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1253 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Task {#1245 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600527 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/767" "field_display_title" => "767" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1243 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1251 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1250 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1252 …2} "content" => Illuminate\Database\Eloquent\Collection {#1246 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1269 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 600527 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/767" "field_display_title" => "767" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1243 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1251 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1250 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1252 …2} "content" => Illuminate\Database\Eloquent\Collection {#1246 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1269 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Task {#1249 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600528 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/768" "field_display_title" => "768" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1248 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1267 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1266 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1268 …2} "content" => Illuminate\Database\Eloquent\Collection {#1247 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1285 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 600528 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/768" "field_display_title" => "768" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1248 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1267 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1266 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1268 …2} "content" => Illuminate\Database\Eloquent\Collection {#1247 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1285 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 3 => App\Models\Task {#1265 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600529 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/769" "field_display_title" => "769" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1264 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1283 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1282 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1284 …2} "content" => Illuminate\Database\Eloquent\Collection {#1263 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1301 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 600529 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/769" "field_display_title" => "769" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1264 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1283 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1282 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1284 …2} "content" => Illuminate\Database\Eloquent\Collection {#1263 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1301 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 4 => App\Models\Task {#1281 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 600530 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/770" "field_display_title" => "770" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1280 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1299 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1298 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1300 …2} "content" => Illuminate\Database\Eloquent\Collection {#1279 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1317 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 600530 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/770" "field_display_title" => "770" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1280 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1299 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1298 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1300 …2} "content" => Illuminate\Database\Eloquent\Collection {#1279 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] …2 ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 5 => App\Models\Task {#1297 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ …24] #original: array:24 [ …24] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 6 => App\Models\Task {#1313 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ …24] #original: array:24 [ …24] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 7 => App\Models\Task {#1332 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ …24] #original: array:24 [ …24] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } ] #original: array:21 [ "id" => 965017 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_url" => "/7-klass/geometrija/merzlyak-fgos/page-193" "field_display_title" => "193" "field_folder" => "1" "field_image_name" => "193" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1113} "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1042} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "edition_groups" => Illuminate\Database\Eloquent\Collection {#1118} "content" => Illuminate\Database\Eloquent\Collection {#1141} "next" => array:2 [ "refs" => "965018" "type" => "book_page" ] "previous" => array:2 [ "refs" => "965016" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1224} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 600531 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "193" "field_page_end" => null "field_url" => "/7-klass/geometrija/merzlyak-fgos/771" "field_display_title" => "771" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1046} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1117} "content" => Illuminate\Database\Eloquent\Collection {#1038} "next" => array:2 [ "refs" => "600532" "type" => "task" ] "previous" => array:2 [ "refs" => "600530" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1107} "page" => array:2 [ "refs" => "965017" "type" => "book_page" ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true 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№771 (с. 193)
Условие 2023. №771 (с. 193)
скриншот условия
771. На рисунке 389 $AM = CN$, $AB = CD$, $BN = DM$. Докажите, что
$\angle ABN = \angle CDM.$
Рис. 389
Решение 3 (2023). №771 (с. 193)
Решение 5 (2023). №771 (с. 193)
Решение 6 (2023). №771 (с. 193)
Для того чтобы доказать, что $ \angle ABN = \angle CDM $, мы докажем, что треугольники $ \triangle ABN $ и $ \triangle CDM $ равны.
По условию задачи нам даны равенства двух пар сторон этих треугольников: $ AB = CD $ и $ BN = DM $. Если мы докажем, что и третьи стороны, $ AN $ и $ CM $, равны, то треугольники будут равны по третьему признаку равенства треугольников (по трем сторонам).
Рассмотрим длины отрезков $ AN $ и $ CM $. Точки A, M, C, N лежат на одной прямой. Длину отрезка $ AN $ можно представить как сумму длин отрезков $ AM $ и $ MN $, то есть $ AN = AM + MN $. Аналогично, длина отрезка $ CM $ равна сумме длин отрезков $ CN $ и $ NM $. Так как длина отрезка $ NM $ равна длине $ MN $, мы можем записать $ CM = CN + MN $.
Из условия задачи известно, что $ AM = CN $. Давайте сравним выражения для длин $ AN $ и $ CM $:
$ AN = AM + MN $
$ CM = CN + MN $
Поскольку правые части этих выражений состоят из соответственно равных слагаемых ($ AM = CN $ и $ MN = MN $), то и сами выражения равны. Таким образом, $ AN = CM $.
Теперь мы можем утверждать, что три стороны треугольника $ \triangle ABN $ соответственно равны трем сторонам треугольника $ \triangle CDM $:
$ AB = CD $ (по условию)
$ BN = DM $ (по условию)
$ AN = CM $ (доказано выше)
Следовательно, по третьему признаку равенства треугольников (по трем сторонам), $ \triangle ABN \cong \triangle CDM $.
Из равенства треугольников следует равенство их соответствующих углов. Угол $ \angle ABN $ в треугольнике $ \triangle ABN $ образован сторонами $ AB $ и $ BN $. Угол $ \angle CDM $ в треугольнике $ \triangle CDM $ образован сторонами $ CD $ и $ DM $. Так как $ AB $ соответствует $ CD $ и $ BN $ соответствует $ DM $, то углы между этими парами сторон равны.
Таким образом, $ \angle ABN = \angle CDM $, что и требовалось доказать.
Ответ: Равенство $ \angle ABN = \angle CDM $ доказано, так как $ \triangle ABN \cong \triangle CDM $ по третьему признаку равенства треугольников (по трем сторонам).
Другие задания:
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