Odpowiedź:
a = 4/7b
O = 2(a + b) = 44cm
P = ab
2a + 2b = 44cm
2(4/7b) + 2b = 44cm
8/7b + 2b = 44cm
1 1/7b + 2b = 44cm
3 1/7b = 44cm
22/7b = 44cm /*7/22
b = 44cm * 7/22 = 14cm
a = 4/7b = 4/7 * 14cm = 8cm
P = ab = 8cm * 14cm = 112cm²
Pole tego prostokata wynosi 112 cm².
Szczegółowe wyjaśnienie:
