Предмет: Геометрия, автор: sergewrulit

В параллелограме ABCD СТОРОНА AB ПЕРПЕНДИКУЛЯРНА AC AB=21 СМ AD=35 СМ.НАЙДИТЕ ПЛОЩАДЬ ПАРАЛЛЕЛОГРАММА"

Ответы

Автор ответа: shadowangel97

найдем АС, треугольник ВАС - прямоугольный, по т. Пифагора АС=√35²-21²=28, площадь = высота на сторону = 28*21=588

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