Предмет: Геометрия, автор: arturkaraev01

в равнобедренном треугольнике авс с основанием ас,внешний угол при вершине а равен 150 градусов. найдите углы треугольника

Ответы

Автор ответа: MaltsevaYulia

2

В равнобедренном треугольнике углы при основании равны. Значит а=с. Угол А = 180 - 150 = 30 (т.к. сумма внутреннего и внешнего углов = 180).
С=А=30.
В= 180 - (а+с) = 180 - 60 = 120 (т к сумма углов в треугольнике = 180)

arturkaraev01: большое спасибо

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