Предмет: Геометрия, автор: sergeysam2017

Ребята пожалуйста помогите!!!

Приложения:

Skubidypapa: Все остальные могу решить только через сосинус и катет. Я думаю вы такого не проходили

sergeysam2017: Ну мы проходили сочинцы и катет

sergeysam2017: *сосинус

Ответы

Автор ответа: Skubidypapa

Ответ:

Объяснение:

№1

т.к. сумма всех углов треугольника равна 180 градусов

180-90-38=52

ответ: 52

№2

У прямоугольного треугольника угол равен 90 градусов

угол А=90 градусов

угол В=х градусов

угол С=4х градусов

сумма всех углов равна 180 градусов

уравнение:

90+х+4х=180

90+5х=180

5х=90

х=18

следовательно угол В=18 градусов

угол С=4*18=72 градусов

ответ: угол В=18 градусов

угол С=72 градусов

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