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P- pole kwadratu
L- obwód kwadratu
a)
b)
bok (a) = = 4 cm
L = 4a
L = 4 * 4 cm = 16 cm
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P = 25 cm^2
bok (a) = = 5 cm
L = 4a
L = 4 * 5 cm = 20 cm