Предмет: Математика, автор: sanyaf71

Найти: угол BOC и угол BAC.


∪AB=83°∪AC=105°

Приложения:

Ответы

Автор ответа: platonovaarina079
0

Ответ:

сначала найдем дугу ВС

360-(дугаВА + дугаАС)= 360-(83+105)=172

и по свойству центрального угла =}

градусная мера угола ВОС = дуге ВС = 172°

по свойству вписанного угла =}

градусная мера угола ВАС = 1/2 дуги ВС

угол ВАС = 172:2=86°

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