Предмет: Математика, автор: vika8467

Длина прямоугольника 1 дм. Это в 2 раза больше его ширины. Чем равен периметр этого прямоугольника?

Ответы

Автор ответа: g6q98g4dfz

1

Відповідь:

3дм или 30 см

Покрокове пояснення: 1дм=10см

10см÷2=5см-ширина

5×2+10×2=30см=3дм-периметр

можно кращу відповідь будь ласка

Автор ответа: aleksandrpiskun19

1

Ответ: 30 см=3 дм

Пошаговое объяснение:1дм=10см

а=10см

в=?

Р=?

в=10:2=5

Р=(10+5)*2=30

30см

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