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Автор - Akim3255

Найдите площадь прямоугольного треугольника, если его катеты равны 3 см и 5 см.

Ответ

Автор - TheMara

Ответ:

Назовём треугольник ABC, пусть AB=3cм, а BC=5см.

S=(AB×BC):2

S=(5×3):2=15:2=7.5 см^2

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