Предмет: Математика, автор: gqjoblp7

Найди площадь и периметр прямоугольника со сторонами 8 см и 9 см.

Ответы

Автор ответа: Dianulya7

a = 8 см
b = 9 см

S = ab = 8 × 9 = 72 см2
P = 2(a+b) = 2(8+9) = 2 × 17 = 34 см.

Ответ: S = 72 см2, Р = 34 см.

Автор ответа: Moestep

P=(8+9)×2
Р=34см

S=8×9
S=72см

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