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bok - 6cm
pole - 6cm*6cm = 36cm²
prostokąt:
I bok - 6cm+3cm = 9cm
II bok - x
pole - 36cm²
9*x = 36 |:9
x = 4cm
P kwadratu = 6²
P kwadratu =36
P prostokąta = a * b
36 = (6+3) * b
36 = 9b /:9
b=4
pole = 6*6= 36 (cm kwadratowe)
Prostokąt
Pole = (6+3)*x=36 (cm kwadratowe)
x=36:9+4 (cm)
odp. boki prostokąta mają po 9 i 4 cm .