Предмет: Геометрия, автор: ivanteevkashko

найти площадь трапеции, диагонали которой равны 7 см и 15 см , средняя линия 10 см

Ответы

Автор ответа: Hrisula

3

Подобные задачи решаются, как правило, однотипно.
Проводится параллельно диагонали прямая до пересечения с продолжением основания.
Находится по ф.Герона площадь треугольника, образованного диагоналями и суммой оснований, и эта площадь равна площади трапеции.
Решение дано во вложении.

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