Предмет: Геометрия, автор: deanic107

Нужно найти угол OKN (с объяснением)

Приложения:

Ответы

Автор ответа: Tanax

Привет!

Ответ: 39 градусов

Пояснение:
1. Угол MON = 180 градусов, угол MOK = 78 градусов, следовательно смежный с ним угол NOK = 180−78 = 102 градуса
2. Треугольник KON - равнобедренный, т.к. OK = ON = Rокр, следовательно угол K = углу N = (180−102)÷2 =78÷2=39 градусов

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