Oblicz długosc przekątnej kwadratu o polu równym 12,5dm
0,5*d*d = 12,5dm²
0,5d² = 12,5dm² |*2
d² = 25dm²
d = 5dm
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0,5*d*d = 12,5dm²
0,5d² = 12,5dm² |*2
d² = 25dm²
d = 5dm