Odpowiedzi

2010-03-28T16:53:37+02:00
A) Pp = a*h * 1/2
Pp = 5 * 12 *1/2 = 30[cm²]
b) h = 6*2 = 12[cm]
Pp = 2 *(a+a) *h *1/2
Pp = 2 *(2+2) * 12 *1/2 = 8*6 = 48[cm²]