Odpowiedzi

2009-11-18T21:41:04+01:00
2009-11-18T21:43:20+01:00
P=2ab+2bc+2ac= 2*8+2*4+2*5= 16+8+10 = 34 cm³
2009-11-18T21:44:11+01:00
Pc = 2pp + pb

pp = 5 * 4 = 20

pb = 2*4*8 + 2*5*8 = 64 + 80
pb = 144

pc = 2*20 + 144 = 40 + 144
pc =184