Предмет: Геометрия, автор: Аноним

Дано: треугольник ABC, BC=8cм, AC=9см. Угол С=30градусов.
Найти: площадь треугольника.

Ответы

Автор ответа: ded1949p

0

Из В на АС опустим перпендикуляр точка Е тр-к ВЕС прямоугольный ВЕ лежит против 30 и =1/2ВС=4 S=9*4/2=18

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