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2
Pc = 7 * 6 + 7 * 8 + 7 * 10 = 42 + 56 + 70 = 168 cm 2
Pc = 2Pp+PB = 2 *24+=48+168=216CM2
Pp =1 ( 16 + 6 ) * 4 = 1 * 18 * 4 = 9 * 4 = 36 cm 2
2 2
Pb=2*13*5+16*6+12*13=130+78+156=364cm 2
Pc = 2*36 + 364=72+364=436 cm2