Сумма острых углов прямоугольного треугольника не превосходит 90?
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20.05.2019 15:50
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Сумма острых углов прямоугольного треугольника всегда 90 градусов, потому что сумма всех углов треугольника 180 градусов. Один угол прямой = 90 градусов.
180 - 90 = 90 градусов.