Odpowiedzi

2009-12-07T15:36:18+01:00
H = 1 i 1/7 * 7 = 8
P = [(7 + b) * 8] /2 = (7 + b) * 4 = 28 + 4*b
4b = 64 - 28 = 36
b = 36/4 = 9
b = 9cm
20 4 20
2009-12-07T15:42:23+01:00
A= 7 cm
h= 1i1/7 *7=8 cm
Pc= [(a+b)*h]:2
64=[(7+b)*8]:2 //*2
(7+b)*8=128 //8
7+b=16
b=16-7
b=9 cm
14 3 14