Предмет: Геометрия, автор: autist13

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Автор ответа: annaurban10
1

Ответ:

2.Если прямоугольный треугольник вписан в окружность, то его гипотенуза является диаметром окружности.

Дано: ΔABC-прямоугольный, ∠B = 90°; AB = 9 см; R=OC=OA=7,5 см.

Найти Равс

Решение:

AC = 2R = 2·7,5 = 15 см

ΔABC, теорема Пифагора

ВС в квадрате=АС в квадрате-АВ в квадрате=144=12

BC = 12 см

Равс = 15 + 9 + 12 = 36 см

autist13: Ты на кокой ответил?
autist13: а все понял
autist13: Спасибо
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