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Автор - dleyaman

Периметр треугольника равен 21 дм. Какова длина каждой его стороны, если все они равны?

Ответ

Автор - mukanova7
Р= 21 дм
треугольник - 3 стороны
21 дм : 3 = 7(дм) - длина одной стороны
Ответ: 7 дм.

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