Odpowiedzi

2009-12-09T17:02:33+01:00
2009-12-09T17:09:15+01:00
P=½ e × f
40=½ 10 × f
40=5 × f /÷5
f=8
a² + b ²= c ²
10 ² + 8 ² = c ²
c ²= 164/ √
c = √164 = √4×41= 2√41
Obw. = 2√41+2√41 + 2√41 + 2√41 = 8√41