Предмет: Геометрия, автор: alex65480

решите пожалуйста дам 40 баллов

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Ответы

Автор ответа: SofiaInstasamka

C=36°

A=72°

B=72°.

Объяснение:

В равнобедренном треугольнике углы при основании равны. Сумма углов треугольника равна 180°.

х - угол при верштне

2х - угол при основании

х + 2х*2 = 180°

5х = 180

х = 36° угол при вершине

36*2 = 72° углы при основании

проверка: 36 + 72 + 72 = 180°

Автор ответа: Mikail2006

Объяснение:

В равнобедренном треугольнике углы при основании равны

Составляем уравнение: за икс (х) берём угол вершины.

х + 2х + 2х = 180°

5х = 180°

х = 180° / 5

х = 36°

∡C → 36°

∡A → 72°

∡B → 72°

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