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a=7-bok kwadratu
Ob=4*7=28[cm]
Odp.Obwód kwadratu wynosi 28cm.;)
L=4*7=28
odp.Obwód kwadratu wynosi 28.
49=a2 pierwiastkujemy
a=7
obw=a+a+a+a
= 7+7+7+7
= 28