Odpowiedzi

2009-12-06T17:25:35+01:00
2009-12-06T17:26:02+01:00
Dane:
a= 3
b= 11
P= 56

P=1/2 (a+b)*h
56 = 1/2 (3+11)*h
56 = 1/2 14 * h
56 = 7h
h = 8
1 5 1