Предмет: Геометрия, автор: m9589946

ПОМОГИТЕ СРОЧНО ПЖ ДАЮ 100 БАЛОВ ЩАДАНИЕ НА ФОТКЕ

Приложения:

aarr04594: 70°.

Ответы

Автор ответа: ggggaaraaaa

1

Відповідь:

Ми можемо спочатку знайти кут D, для цього ми розглянемо чотирикутник MBND. Сума кутів у чотирикутників 360⁰. Ми знаємо, що в куті DMB 90⁰, ВN - висота, тому кут BND - 90⁰. Щоб знайти D треба від суми всіх кутів (360⁰) відняти всі інші. Кут D=360⁰- DMB - BND - MBN=360-90-90-70=110⁰. За властивістю кутів паралелограма ми знаємо, що сума кутів прилеглих до однієї сторони 180⁰. А=180⁰-D=180-110=70⁰

Відповідь: 70⁰

Взагалі є багато варіантів як розв'язати це, але я обрала такий

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