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Obl H
4*5 + 4*3,5 = 20 + 14 = 34
1/2 * 34 = 17
P powierzchni = 2*Pp + Pb = 2* 17,5 + 2*17*5 + 2*17*3,5 = 35+ 170 + 119 = 324
Pole powierzchni wynosi 324 cm ²