Предмет: Математика, автор: alisapak322

как решать 12 номер?

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Автор ответа: gennadui

Правильно проведены высоты, теперь считаем площадь по формуле $S= frac{a* h_{a} }{2}$
По формуле получим $S= frac{3*3}{2}=4,5$

Ответ: 4,5

Автор ответа: alisapak322

большое спасибо)

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