Odpowiedzi

2009-12-14T20:09:22+01:00
Pb=6ab
a=7cm
b=20cm
P=6*7*20=840cm2
2009-12-14T20:08:53+01:00
2009-12-14T20:10:48+01:00
P1=a*b
p1=7*20
p1=140cm2
Pb=6*P1
Pb=6*140
Pb= 840cm2