Предмет: Математика, автор: sofia186

Ученик начертил прямоугольник и квадрат с равными периметрами. Ширина прямоугольника 2см, а длина на 1 дм больше. Найдите площадь квадрата.

Ответы

Автор ответа: blincik52

0

1дм=10см
Длина = 10см+2см=12см
Pпрям=2(a+b)= 2(12+10)=44
Pквадр=4а=> а=44/4=11
S=a×a=11×11=121см^2

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