Obwód kwadratu wynosi 12 cm. Ile wynosi pole tego kwadratu?
P = 3cm x 3cm = 9cm
12:4=3cm - dł. jednego boku
P=a^2=3^2=9cm^2
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P = 3cm x 3cm = 9cm
12:4=3cm - dł. jednego boku
P=a^2=3^2=9cm^2