Предмет: Геометрия, автор: pur2015

найдите углы четырехугольника если три угла его равны между собой, а четвертый больше одного из них на 80 градусов

Ответы

Автор ответа: Rafadze

всего сумма углов в четырехугольнике равно 360 градусов. обозначим за х 1 угол, тогда 3х+х+80=360. 4х=280, х=70.

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