Odpowiedzi

2009-11-06T21:10:23+01:00
2009-11-06T21:11:10+01:00
2009-11-06T21:12:25+01:00
A = 12 cm
h =0,5*a = 6cm
b = 6cm +1,5cm = 7,5 cm
P ={[a+b]*h} : 2={ [12+7,5]*6} : 2 = 117:2 =58,5
P = 58,5 cm^2