Предмет: Геометрия, автор: Khalid13

в равнобедренном ∆ABC (AB-BC)внешний угол BCK равен 150° найти угол АВС

Ответы

Автор ответа: limak1

16

уголBCA=180-150=30°. т.к. треугольник равнобедренный, то и уголBCA=CAB=30°.
УголABC=180-30-30=120°
Ответ: 120°

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