Предмет: Геометрия, автор: Юля5

В прямоугольном треугольнике авс угол с=90 градусов.угол в=60 градусов.ав=15см.найти вс

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Автор ответа: Рррррррррррр

Т.к угол С=90 градусов, а угол В=60 градусов,то угол А=30 градусов(180-(60+90)), из этого следует что против угла 30 градусов, катет равен половине гипотенузе, следовательно 15/2=7,5 ВС=7,5

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