Предмет: Геометрия, автор: oleggavryliv44

Точка М середина хорди AB кола з центром в точці O . Знайдіть кут OBA якщо кут MOB 54 градуси

Ответы

Автор ответа: shavrinatv

2

Ответ:

∠ОВА= 36°

Объяснение:

ОА=ОВ=r

ΔOAB - равнобедр.

ОМ - медиана и высота

Из ΔОМВ(∠ВМ0=90°,МОВ=54°) ∠ОВМ=180°-(90°+54°)=36°

∠ОВА= ∠ОВМ=36°

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