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Номер 711, страница 179 - гдз по геометрии 10-11 класс учебник Атанасян, Бутузов
Авторы: Атанасян Л. С., Бутузов В. Ф., Кадомцев С. Б., Позняк Э. Г., Киселёва Л. С.
Тип: Учебник
Издательство: Просвещение
Год издания: 2019 - 2026
Уровень обучения: базовый и углублённый
Цвет обложки: коричневый с ромбами
ISBN: 978-5-09-103606-0 (2023)
Допущено Министерством просвещения Российской Федерации
Математика: алгебра и начала математического анализа, геометрия
Популярные ГДЗ в 10 классе
Глава 7. Метод координат в пространстве. Движения. Параграф 2. Скалярное произведение векторов - номер 711, страница 179.
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" => 745126 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "179" "field_page_end" => null "field_url" => "/10-klass/geometrija/atanasjan-uchebnik/00-711" "field_display_title" => "711" "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" => 744405 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Метод координат в пространстве. Движения" "field_branch_order" => "7" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050 #items: array:1 [ 0 => App\Models\Term {#1047 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => null ] #original: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => 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_page_start" => "160" "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 {#1086 #items: array:1 [ 0 => App\Models\Book {#1049 #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" => 36 "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 {#1051 #items: array:1 [ 0 => App\Models\Term {#1048 #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 [ …10] #original: array:10 [ …10] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1052 #items: array:2 [ 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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 1 => App\Models\Term {#1054 #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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_publisher" => Illuminate\Database\Eloquent\Collection {#1055 #items: array:1 [ 0 => 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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_author" => Illuminate\Database\Eloquent\Collection {#1057 #items: array:5 [ 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 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 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 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 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 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 3 => App\Models\Term {#1061 #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 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 4 => App\Models\Term {#1062 #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 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1063 #items: [] #escapeWhenCastingToString: false } "field_book_type" => 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:10 [ …10] #original: array:10 [ …10] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_country" => 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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_city" => Illuminate\Database\Eloquent\Collection {#1068 #items: array:1 [ 0 => App\Models\Term {#1069 #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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_series" => Illuminate\Database\Eloquent\Collection {#1070 #items: [] #escapeWhenCastingToString: false } "field_umk" => Illuminate\Database\Eloquent\Collection {#1071 #items: [] #escapeWhenCastingToString: false } "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1072 #items: array:1 [ 0 => 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:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074 #items: array:1 [ 0 => App\Models\Term {#1075 #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 [ …10] #original: array:10 [ …10] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_publication_number" => "11" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1076 #items: array:1 [ 0 => App\Models\Term {#1077 #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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1078 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition_degree" => null "field_cover_description" => "с ромбами" "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для общеобразовательных организаций" "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия" "field_link_to_source" => null "field_tasks_count" => "1147" "field_priority" => "12" "field_default_folder" => "/geometrija_10/atanasjan-u23/" "field_isbn" => "978-5-09-103606-0 (2023)" "field_cover" => array:1 [ 0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242" "alt" => "" "width" => "1200" "height" => "1661" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1079 #items: [] #escapeWhenCastingToString: false } "field_new_book" => Illuminate\Database\Eloquent\Collection {#1080 #items: [] #escapeWhenCastingToString: false } "field_old_book" => Illuminate\Database\Eloquent\Collection {#1081 #items: [] #escapeWhenCastingToString: false } "field_url" => "/10-klass/geometrija/atanasjan-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082 #items: array:1 [ 0 => App\Models\Term {#1083 #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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 381 "subject" => 543 "class_subject" => 392 ] ] #original: array:50 [ "id" => 36 "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 {#1051} "field_class" => Illuminate\Database\Eloquent\Collection {#1052} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1055} "field_author" => Illuminate\Database\Eloquent\Collection {#1057} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1063} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1064} "field_country" => Illuminate\Database\Eloquent\Collection {#1066} "field_city" => Illuminate\Database\Eloquent\Collection {#1068} "field_series" => Illuminate\Database\Eloquent\Collection {#1070} "field_umk" => Illuminate\Database\Eloquent\Collection {#1071} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1072} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074} "field_publication_number" => "11" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1076} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1078} "field_under_the_edition_degree" => null "field_cover_description" => "с ромбами" "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для общеобразовательных организаций" "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия" "field_link_to_source" => null "field_tasks_count" => "1147" "field_priority" => "12" "field_default_folder" => "/geometrija_10/atanasjan-u23/" "field_isbn" => "978-5-09-103606-0 (2023)" "field_cover" => array:1 [ 0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242" "alt" => "" "width" => "1200" "height" => "1661" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1079} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1080} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1081} "field_url" => "/10-klass/geometrija/atanasjan-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 381 "subject" => 543 "class_subject" => 392 ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1084 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 744405 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Метод координат в пространстве. Движения" "field_branch_order" => "7" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050} "field_page_start" => "160" "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 {#1086} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1084} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "parent_branches" => Illuminate\Database\Eloquent\Collection {#1164 #items: array:2 [ 0 => App\Models\Branch {#1038 #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" => 744405 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Метод координат в пространстве. Движения" "field_branch_order" => "7" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1034 #items: array:1 [ 0 => App\Models\Term {#1039 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => null ] #original: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => 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_page_start" => "160" "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 {#1042 #items: array:1 [ 0 => App\Models\Book {#1040 #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" => 36 "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 {#1043 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1091 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1097 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1098 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1104 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1105 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1106 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1108 …2} "field_publication_number" => "11" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1110 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1112 …2} "field_under_the_edition_degree" => null "field_cover_description" => "с ромбами" "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для общеобразовательных организаций" "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия" "field_link_to_source" => null "field_tasks_count" => "1147" "field_priority" => "12" "field_default_folder" => "/geometrija_10/atanasjan-u23/" "field_isbn" => "978-5-09-103606-0 (2023)" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1113 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1114 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_url" => "/10-klass/geometrija/atanasjan-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1116 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #original: array:50 [ "id" => 36 "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 {#1043 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1091 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1097 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1098 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1104 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1105 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1106 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1108 …2} "field_publication_number" => "11" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1110 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1112 …2} "field_under_the_edition_degree" => null "field_cover_description" => "с ромбами" "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для общеобразовательных организаций" "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия" "field_link_to_source" => null "field_tasks_count" => "1147" "field_priority" => "12" "field_default_folder" => "/geometrija_10/atanasjan-u23/" "field_isbn" => "978-5-09-103606-0 (2023)" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1113 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1114 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_url" => "/10-klass/geometrija/atanasjan-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1116 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1118 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 744405 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Метод координат в пространстве. Движения" "field_branch_order" => "7" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1034} "field_page_start" => "160" "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 {#1042} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1118} ] #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 {#1119 #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" => 744407 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Скалярное произведение векторов" "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1120 #items: array:1 [ 0 => App\Models\Term {#1121 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 32 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Параграф" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => "§" ] #original: array:7 [ "id" => 32 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Параграф" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "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_page_start" => "171" "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 {#1122 #items: array:1 [ 0 => App\Models\Book {#1123 #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" => 36 "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 {#1124 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1126 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1129 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1131 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1137 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1138 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1140 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1142 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1144 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1145 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1146 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1148 …2} "field_publication_number" => "11" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1150 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1152 …2} "field_under_the_edition_degree" => null "field_cover_description" => "с ромбами" "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для общеобразовательных организаций" "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия" "field_link_to_source" => null "field_tasks_count" => "1147" "field_priority" => "12" "field_default_folder" => "/geometrija_10/atanasjan-u23/" "field_isbn" => "978-5-09-103606-0 (2023)" …15 ] #original: array:50 [ …50] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1158 #items: array:1 [ 0 => App\Models\Branch {#1159 #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 [ …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:24 [ "id" => 744407 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Скалярное произведение векторов" "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1120} "field_page_start" => "171" "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 {#1122} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1158} ] #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 {#1165 #items: array:6 [ 0 => App\Models\Element {#1179 #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" => 939607 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1188 #items: array:1 [ 0 => App\Models\Edition {#1180 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "text" => "<p> <b>711.</b> В тетраэдре ABCD <span class="long">∠ABD = ∠ABC = ∠DBC = 90°,</span> <span class="long">AB = BD = 2,</span> <span class="long">BC = 1.</span> Вычислите синус угла между прямой, проходящей через середины рёбер AD и ВС, и плоскостью грани: <span class="long">а) ABD;</span> <span class="long">б) DBC;</span> <span class="long">в) ABC.</span> </p>" "img" => array:1 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1562" "height" => 198 "path" => "/media/geometrija_10/atanasjan-u23/0-00/711-1.webp?ts=1739436846" ] ] ] #original: array:7 [ "id" => 939607 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1188} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "text" => "<p> <b>711.</b> В тетраэдре ABCD <span class="long">∠ABD = ∠ABC = ∠DBC = 90°,</span> <span class="long">AB = BD = 2,</span> <span class="long">BC = 1.</span> Вычислите синус угла между прямой, проходящей через середины рёбер AD и ВС, и плоскостью грани: <span class="long">а) ABD;</span> <span class="long">б) DBC;</span> <span class="long">в) ABC.</span> </p>" "img" => array:1 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1562" "height" => 198 "path" => "/media/geometrija_10/atanasjan-u23/0-00/711-1.webp?ts=1739436846" ] ] ] #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 {#1210 #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" => 942577 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1220 #items: array:1 [ 0 => App\Models\Edition {#1211 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:3 [ 0 => array:5 [ "name" => "711-1.png" "alt" => null "width" => "694" "height" => 3495 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-1.webp?ts=1739441614" ] 1 => array:5 [ "name" => "711-2.png" "alt" => null "width" => "694" "height" => 3463 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-2.webp?ts=1739441614" ] 2 => array:5 [ "name" => "711-3.png" "alt" => null "width" => "694" "height" => 3465 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-3.webp?ts=1739441614" ] ] ] #original: array:6 [ "id" => 942577 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1220} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:3 [ 0 => array:5 [ "name" => "711-1.png" "alt" => null "width" => "694" "height" => 3495 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-1.webp?ts=1739441614" ] 1 => array:5 [ "name" => "711-2.png" "alt" => null "width" => "694" "height" => 3463 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-2.webp?ts=1739441614" ] 2 => array:5 [ "name" => "711-3.png" "alt" => null "width" => "694" "height" => 3465 "path" => "/media/geometrija_10/atanasjan-u23/2-00/711-3.webp?ts=1739441614" ] ] ] #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 {#1202 #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" => 942397 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1212 #items: array:1 [ 0 => App\Models\Edition {#1203 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:2 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1373" "height" => 644 "path" => "/media/geometrija_10/atanasjan-u23/3-00/711-1.webp?ts=1739437171" ] 1 => array:5 [ "name" => "711-2.jpg" "alt" => null "width" => "1373" "height" => 520 "path" => "/media/geometrija_10/atanasjan-u23/3-00/711-2.webp?ts=1739437171" ] ] ] #original: array:6 [ "id" => 942397 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1212} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:2 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1373" "height" => 644 "path" => "/media/geometrija_10/atanasjan-u23/3-00/711-1.webp?ts=1739437171" ] 1 => array:5 [ "name" => "711-2.jpg" "alt" => null "width" => "1373" "height" => 520 "path" => "/media/geometrija_10/atanasjan-u23/3-00/711-2.webp?ts=1739437171" ] ] ] #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 {#1186 #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" => 941969 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1196 #items: array:1 [ 0 => App\Models\Edition {#1187 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:2 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1367" "height" => 1433 "path" => "/media/geometrija_10/atanasjan-u23/4-00/711-1.webp?ts=1739436713" ] 1 => array:5 [ "name" => "711-2.jpg" "alt" => null "width" => "1367" "height" => 520 "path" => "/media/geometrija_10/atanasjan-u23/4-00/711-2.webp?ts=1739436713" ] ] ] #original: array:6 [ "id" => 941969 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1196} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:2 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1367" "height" => 1433 "path" => "/media/geometrija_10/atanasjan-u23/4-00/711-1.webp?ts=1739436713" ] 1 => array:5 [ "name" => "711-2.jpg" "alt" => null "width" => "1367" "height" => 520 "path" => "/media/geometrija_10/atanasjan-u23/4-00/711-2.webp?ts=1739436713" ] ] ] #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\Element {#1194 #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" => 942039 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1204 #items: array:1 [ 0 => App\Models\Edition {#1195 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1329" "height" => 907 "path" => "/media/geometrija_10/atanasjan-u23/5-00/711-1.webp?ts=1739436747" ] ] ] #original: array:6 [ "id" => 942039 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1204} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "711-1.jpg" "alt" => null "width" => "1329" "height" => 907 "path" => "/media/geometrija_10/atanasjan-u23/5-00/711-1.webp?ts=1739436747" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 5 => App\Models\Element {#1218 #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" => 1352439 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1228 #items: array:1 [ 0 => App\Models\Edition {#1219 #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 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "745126" "type" => "task" ] "text" => "<p>Для решения задачи воспользуемся методом координат. Условие $\angle ABD = \angle ABC = \angle DBC = 90^\circ$ означает, что ребра $BA, BC, BD$ попарно перпендикулярны. Это позволяет удобно расположить тетраэдр в прямоугольной системе координат.</p><p>Поместим вершину $B$ в начало координат $B(0, 0, 0)$. Направим оси координат вдоль ребер: ось $Ox$ вдоль ребра $BD$, ось $Oy$ вдоль ребра $BA$ и ось $Oz$ вдоль ребра $BC$.</p><p>С учетом заданных длин ребер $AB=2$, $BD=2$ и $BC=1$, определим координаты вершин тетраэдра:<br>$B(0, 0, 0)$<br>$A(0, 2, 0)$<br>$D(2, 0, 0)$<br>$C(0, 0, 1)$</p><p>Пусть $M$ — середина ребра $AD$, а $N$ — середина ребра $BC$. Найдем их координаты, используя формулу середины отрезка:</p><p>Координаты точки $M$: $M = (\frac{x_A+x_D}{2}, \frac{y_A+y_D}{2}, \frac{z_A+z_D}{2}) = (\frac{0+2}{2}, \frac{2+0}{2}, \frac{0+0}{2}) = (1, 1, 0)$.</p><p>Координаты точки $N$: $N = (\frac{x_B+x_C}{2}, \frac{y_B+y_C}{2}, \frac{z_B+z_C}{2}) = (\frac{0+0}{2}, \frac{0+0}{2}, \frac{0+1}{2}) = (0, 0, \frac{1}{2})$.</p><p>Теперь найдем направляющий вектор $\vec{v}$ прямой, проходящей через точки $M$ и $N$:</p><p>$\vec{v} = \vec{MN} = (x_N-x_M, y_N-y_M, z_N-z_M) = (0-1, 0-1, \frac{1}{2}-0) = (-1, -1, \frac{1}{2})$.</p><p>Вычислим длину (модуль) этого вектора:</p><p>$|\vec{v}| = |\vec{MN}| = \sqrt{(-1)^2 + (-1)^2 + (\frac{1}{2})^2} = \sqrt{1 + 1 + \frac{1}{4}} = \sqrt{\frac{9}{4}} = \frac{3}{2}$.</p><p>Синус угла $\alpha$ между прямой с направляющим вектором $\vec{v}$ и плоскостью с вектором нормали $\vec{n}$ вычисляется по формуле:</p><p>$\sin \alpha = \frac{|\vec{v} \cdot \vec{n}|}{|\vec{v}| \cdot |\vec{n}|}$</p><p><strong>а)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $ABD$.<br>Плоскость грани $ABD$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $D(2,0,0)$. Она совпадает с координатной плоскостью $Oxy$, уравнение которой $z=0$.<br>Вектор нормали к этой плоскости $\vec{n}_a = (0, 0, 1)$. Его модуль $|\vec{n}_a| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_a$:<br>$\vec{v} \cdot \vec{n}_a = (-1) \cdot 0 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 1 = \frac{1}{2}$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_a = \frac{|\vec{v} \cdot \vec{n}_a|}{|\vec{v}| \cdot |\vec{n}_a|} = \frac{|\frac{1}{2}|}{\frac{3}{2} \cdot 1} = \frac{1/2}{3/2} = \frac{1}{3}$.<br><strong>Ответ:</strong> $\frac{1}{3}$.</p><p><strong>б)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $DBC$.<br>Плоскость грани $DBC$ проходит через точки $D(2,0,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oxz$, уравнение которой $y=0$.<br>Вектор нормали к этой плоскости $\vec{n}_b = (0, 1, 0)$. Его модуль $|\vec{n}_b| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_b$:<br>$\vec{v} \cdot \vec{n}_b = (-1) \cdot 0 + (-1) \cdot 1 + (\frac{1}{2}) \cdot 0 = -1$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_b = \frac{|\vec{v} \cdot \vec{n}_b|}{|\vec{v}| \cdot |\vec{n}_b|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.<br><strong>Ответ:</strong> $\frac{2}{3}$.</p><p><strong>в)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $ABC$.<br>Плоскость грани $ABC$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oyz$, уравнение которой $x=0$.<br>Вектор нормали к этой плоскости $\vec{n}_c = (1, 0, 0)$. Его модуль $|\vec{n}_c| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_c$:<br>$\vec{v} \cdot \vec{n}_c = (-1) \cdot 1 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 0 = -1$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_c = \frac{|\vec{v} \cdot \vec{n}_c|}{|\vec{v}| \cdot |\vec{n}_c|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.<br><strong>Ответ:</strong> $\frac{2}{3}$.</p>" ] #original: array:6 [ "id" => 1352439 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1228} "task" => array:2 [ "refs" => "745126" "type" => "task" ] "text" => "<p>Для решения задачи воспользуемся методом координат. Условие $\angle ABD = \angle ABC = \angle DBC = 90^\circ$ означает, что ребра $BA, BC, BD$ попарно перпендикулярны. Это позволяет удобно расположить тетраэдр в прямоугольной системе координат.</p><p>Поместим вершину $B$ в начало координат $B(0, 0, 0)$. Направим оси координат вдоль ребер: ось $Ox$ вдоль ребра $BD$, ось $Oy$ вдоль ребра $BA$ и ось $Oz$ вдоль ребра $BC$.</p><p>С учетом заданных длин ребер $AB=2$, $BD=2$ и $BC=1$, определим координаты вершин тетраэдра:<br>$B(0, 0, 0)$<br>$A(0, 2, 0)$<br>$D(2, 0, 0)$<br>$C(0, 0, 1)$</p><p>Пусть $M$ — середина ребра $AD$, а $N$ — середина ребра $BC$. Найдем их координаты, используя формулу середины отрезка:</p><p>Координаты точки $M$: $M = (\frac{x_A+x_D}{2}, \frac{y_A+y_D}{2}, \frac{z_A+z_D}{2}) = (\frac{0+2}{2}, \frac{2+0}{2}, \frac{0+0}{2}) = (1, 1, 0)$.</p><p>Координаты точки $N$: $N = (\frac{x_B+x_C}{2}, \frac{y_B+y_C}{2}, \frac{z_B+z_C}{2}) = (\frac{0+0}{2}, \frac{0+0}{2}, \frac{0+1}{2}) = (0, 0, \frac{1}{2})$.</p><p>Теперь найдем направляющий вектор $\vec{v}$ прямой, проходящей через точки $M$ и $N$:</p><p>$\vec{v} = \vec{MN} = (x_N-x_M, y_N-y_M, z_N-z_M) = (0-1, 0-1, \frac{1}{2}-0) = (-1, -1, \frac{1}{2})$.</p><p>Вычислим длину (модуль) этого вектора:</p><p>$|\vec{v}| = |\vec{MN}| = \sqrt{(-1)^2 + (-1)^2 + (\frac{1}{2})^2} = \sqrt{1 + 1 + \frac{1}{4}} = \sqrt{\frac{9}{4}} = \frac{3}{2}$.</p><p>Синус угла $\alpha$ между прямой с направляющим вектором $\vec{v}$ и плоскостью с вектором нормали $\vec{n}$ вычисляется по формуле:</p><p>$\sin \alpha = \frac{|\vec{v} \cdot \vec{n}|}{|\vec{v}| \cdot |\vec{n}|}$</p><p><strong>а)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $ABD$.<br>Плоскость грани $ABD$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $D(2,0,0)$. Она совпадает с координатной плоскостью $Oxy$, уравнение которой $z=0$.<br>Вектор нормали к этой плоскости $\vec{n}_a = (0, 0, 1)$. Его модуль $|\vec{n}_a| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_a$:<br>$\vec{v} \cdot \vec{n}_a = (-1) \cdot 0 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 1 = \frac{1}{2}$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_a = \frac{|\vec{v} \cdot \vec{n}_a|}{|\vec{v}| \cdot |\vec{n}_a|} = \frac{|\frac{1}{2}|}{\frac{3}{2} \cdot 1} = \frac{1/2}{3/2} = \frac{1}{3}$.<br><strong>Ответ:</strong> $\frac{1}{3}$.</p><p><strong>б)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $DBC$.<br>Плоскость грани $DBC$ проходит через точки $D(2,0,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oxz$, уравнение которой $y=0$.<br>Вектор нормали к этой плоскости $\vec{n}_b = (0, 1, 0)$. Его модуль $|\vec{n}_b| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_b$:<br>$\vec{v} \cdot \vec{n}_b = (-1) \cdot 0 + (-1) \cdot 1 + (\frac{1}{2}) \cdot 0 = -1$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_b = \frac{|\vec{v} \cdot \vec{n}_b|}{|\vec{v}| \cdot |\vec{n}_b|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.<br><strong>Ответ:</strong> $\frac{2}{3}$.</p><p><strong>в)</strong> Найдем синус угла между прямой $MN$ и плоскостью грани $ABC$.<br>Плоскость грани $ABC$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oyz$, уравнение которой $x=0$.<br>Вектор нормали к этой плоскости $\vec{n}_c = (1, 0, 0)$. Его модуль $|\vec{n}_c| = 1$.<br>Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_c$:<br>$\vec{v} \cdot \vec{n}_c = (-1) \cdot 1 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 0 = -1$.<br>Теперь вычислим синус угла:<br>$\sin \alpha_c = \frac{|\vec{v} \cdot \vec{n}_c|}{|\vec{v}| \cdot |\vec{n}_c|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.<br><strong>Ответ:</strong> $\frac{2}{3}$.</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" => "745127" "type" => "task" ] "previous" => array:2 [ "refs" => "745125" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1177 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1174 #items: array:1 [ 0 => App\Models\BookPage {#1172 #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" => 933961 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "179" "field_url" => "/10-klass/geometrija/atanasjan-uchebnik/page-179" "field_display_title" => "179" "field_folder" => "1" "field_image_name" => "179" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1170 #items: [] #escapeWhenCastingToString: false } "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1168 #items: array:1 [ 0 => App\Models\Book {#1049} ] #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 {#1171 #items: [] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1235 #items: array:1 [ 0 => App\Models\Element {#1234 #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 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "933962" "type" => "book_page" ] "previous" => array:2 [ "refs" => "933960" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1412 #items: array:11 [ 0 => App\Models\Task {#1430 #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] } 1 => App\Models\Task {#1437 #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] } 2 => App\Models\Task {#1440 #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] } 3 => App\Models\Task {#1439 #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] } 4 => App\Models\Task {#1441 #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] } 5 => App\Models\Task {#1504 #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 {#1507 #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 {#1506 #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] } 8 => App\Models\Task {#1508 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 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App\Models\Task {#1505 #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" => 933961 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "179" "field_url" => "/10-klass/geometrija/atanasjan-uchebnik/page-179" "field_display_title" => "179" "field_folder" => "1" "field_image_name" => "179" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1170} "field_weight" => "0" 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#dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] }
№711 (с. 179)
Условие. №711 (с. 179)
скриншот условия
711. В тетраэдре ABCD ∠ABD = ∠ABC = ∠DBC = 90°, AB = BD = 2, BC = 1. Вычислите синус угла между прямой, проходящей через середины рёбер AD и ВС, и плоскостью грани: а) ABD; б) DBC; в) ABC.
Решение 2. №711 (с. 179)
Решение 3. №711 (с. 179)
Решение 4. №711 (с. 179)
Решение 5. №711 (с. 179)
Решение 6. №711 (с. 179)
Для решения задачи воспользуемся методом координат. Условие $\angle ABD = \angle ABC = \angle DBC = 90^\circ$ означает, что ребра $BA, BC, BD$ попарно перпендикулярны. Это позволяет удобно расположить тетраэдр в прямоугольной системе координат.
Поместим вершину $B$ в начало координат $B(0, 0, 0)$. Направим оси координат вдоль ребер: ось $Ox$ вдоль ребра $BD$, ось $Oy$ вдоль ребра $BA$ и ось $Oz$ вдоль ребра $BC$.
С учетом заданных длин ребер $AB=2$, $BD=2$ и $BC=1$, определим координаты вершин тетраэдра:
$B(0, 0, 0)$
$A(0, 2, 0)$
$D(2, 0, 0)$
$C(0, 0, 1)$
Пусть $M$ — середина ребра $AD$, а $N$ — середина ребра $BC$. Найдем их координаты, используя формулу середины отрезка:
Координаты точки $M$: $M = (\frac{x_A+x_D}{2}, \frac{y_A+y_D}{2}, \frac{z_A+z_D}{2}) = (\frac{0+2}{2}, \frac{2+0}{2}, \frac{0+0}{2}) = (1, 1, 0)$.
Координаты точки $N$: $N = (\frac{x_B+x_C}{2}, \frac{y_B+y_C}{2}, \frac{z_B+z_C}{2}) = (\frac{0+0}{2}, \frac{0+0}{2}, \frac{0+1}{2}) = (0, 0, \frac{1}{2})$.
Теперь найдем направляющий вектор $\vec{v}$ прямой, проходящей через точки $M$ и $N$:
$\vec{v} = \vec{MN} = (x_N-x_M, y_N-y_M, z_N-z_M) = (0-1, 0-1, \frac{1}{2}-0) = (-1, -1, \frac{1}{2})$.
Вычислим длину (модуль) этого вектора:
$|\vec{v}| = |\vec{MN}| = \sqrt{(-1)^2 + (-1)^2 + (\frac{1}{2})^2} = \sqrt{1 + 1 + \frac{1}{4}} = \sqrt{\frac{9}{4}} = \frac{3}{2}$.
Синус угла $\alpha$ между прямой с направляющим вектором $\vec{v}$ и плоскостью с вектором нормали $\vec{n}$ вычисляется по формуле:
$\sin \alpha = \frac{|\vec{v} \cdot \vec{n}|}{|\vec{v}| \cdot |\vec{n}|}$
а) Найдем синус угла между прямой $MN$ и плоскостью грани $ABD$.
Плоскость грани $ABD$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $D(2,0,0)$. Она совпадает с координатной плоскостью $Oxy$, уравнение которой $z=0$.
Вектор нормали к этой плоскости $\vec{n}_a = (0, 0, 1)$. Его модуль $|\vec{n}_a| = 1$.
Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_a$:
$\vec{v} \cdot \vec{n}_a = (-1) \cdot 0 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 1 = \frac{1}{2}$.
Теперь вычислим синус угла:
$\sin \alpha_a = \frac{|\vec{v} \cdot \vec{n}_a|}{|\vec{v}| \cdot |\vec{n}_a|} = \frac{|\frac{1}{2}|}{\frac{3}{2} \cdot 1} = \frac{1/2}{3/2} = \frac{1}{3}$.
Ответ: $\frac{1}{3}$.
б) Найдем синус угла между прямой $MN$ и плоскостью грани $DBC$.
Плоскость грани $DBC$ проходит через точки $D(2,0,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oxz$, уравнение которой $y=0$.
Вектор нормали к этой плоскости $\vec{n}_b = (0, 1, 0)$. Его модуль $|\vec{n}_b| = 1$.
Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_b$:
$\vec{v} \cdot \vec{n}_b = (-1) \cdot 0 + (-1) \cdot 1 + (\frac{1}{2}) \cdot 0 = -1$.
Теперь вычислим синус угла:
$\sin \alpha_b = \frac{|\vec{v} \cdot \vec{n}_b|}{|\vec{v}| \cdot |\vec{n}_b|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.
Ответ: $\frac{2}{3}$.
в) Найдем синус угла между прямой $MN$ и плоскостью грани $ABC$.
Плоскость грани $ABC$ проходит через точки $A(0,2,0)$, $B(0,0,0)$ и $C(0,0,1)$. Она совпадает с координатной плоскостью $Oyz$, уравнение которой $x=0$.
Вектор нормали к этой плоскости $\vec{n}_c = (1, 0, 0)$. Его модуль $|\vec{n}_c| = 1$.
Найдем скалярное произведение векторов $\vec{v}$ и $\vec{n}_c$:
$\vec{v} \cdot \vec{n}_c = (-1) \cdot 1 + (-1) \cdot 0 + (\frac{1}{2}) \cdot 0 = -1$.
Теперь вычислим синус угла:
$\sin \alpha_c = \frac{|\vec{v} \cdot \vec{n}_c|}{|\vec{v}| \cdot |\vec{n}_c|} = \frac{|-1|}{\frac{3}{2} \cdot 1} = \frac{1}{3/2} = \frac{2}{3}$.
Ответ: $\frac{2}{3}$.
Другие задания:
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