Предмет: Геометрия, автор: ARGENT1

Треугольник АВС
АD-биссектриса
угол С=30 градусов
угол BAD=69 градусов
Найдите:угол ADB

Ответы

Автор ответа: ZiрpO

1

уголА=69+69=138
уголВ=180-30-138=12
уголАDB=180-12-69=99

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