Предмет: Геометрия, автор: Bronenosik

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Автор ответа: DaXaTa28

Внешний угол и угол BCA смежные, значит BCA=180-125=55

Треугольник равнобедренный, тк BA=BC, а значит углы при основании равны, значит BCA=BAC=55

Вершина: 180-55-55=70см

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