Предмет: Геометрия, автор: ryblevasemenova

в равнобедренном треугольнике с основанием АС известно, что угол ВАС равен 40° . найдите величину угла АВС

Ответы

Автор ответа: Boniella

180- (2*40)=180-80=100 градусов

Автор ответа: gusmakvlad

сумма всех углов в треугольнике =180
поскольку это равнобедренный треугольник, то углы при основании будут равны, т.е. по 40°! отсюда следует, что угол при вершине равнобедренного треугольника равен 180-(2*40)=100°

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