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)160cm x 160cm):2 = 25600cm : 2 = 12800cm2
A = 1,6
P = 1,6 x 1,6
p = 24 (wynik moze byc zly bo nie chcialo mi sie obliczac pisemnie ;d xD)
P=d^2/2
P=1,6*1,6/2
P=1,28[m]