P=a*b
P=16 cm*13 cm=208 cm2- pole postokąta
P=a2
P=12 cm*12 cm=144 cm2- pole kwadratu
144/208*100%=9/13*100%=900/13%=69 i 3/13%
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P=a*b
P=16 cm*13 cm=208 cm2- pole postokąta
P=a2
P=12 cm*12 cm=144 cm2- pole kwadratu
144/208*100%=9/13*100%=900/13%=69 i 3/13%