Предмет: Математика, автор: umka1525

Пожалуйста Найдите площадь треугольника если его стороны 20,25,15!!!!!!!!!!!!!!!!!

Ответы

Автор ответа: slganiev

Ответ:

150 см²

Пошаговое объяснение:

р=20+25+15/2=30 це полупериметр.

за теоремою Герона, S=√30(30-25)(30-20)(30-15)=√22500=150(см²)

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