Предмет: Математика, автор: iojibkam

периметр треугольника 20 см.длина двух его стороны 7и8 см.какая длина третей стороны?

Ответы

Автор ответа: eap1998

1

20-(7+8)=20-15=5 см длина третьей стороны

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