Предмет: Математика, автор: bdominika742

знайди периметр і площу прямокутника одна сторона яркого дорівнює 7см а друга в 3 рази більша за неї​

Ответы

Автор ответа: vtrotsko
0

Відповідь:периметр=56 см, площа=147см2

Покрокове пояснення:1) 7×3=21 (см)- друга сторона

2) Р=(7+21)×2=56(см)- периметр

3) S=7×21=147(см2)-площа

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