Odpowiedzi

2009-11-26T22:25:41+01:00
(250m+450m)x400m:2=140000m²
140000m²=14ha
14x4,5=63 tony
2009-11-26T22:26:00+01:00
Pole trapezu = ½ *(a+b)*h= ½*(250m+450m)*400m=½*700*400=140000m²

140000m²=14 ha

14*4,5=63 tony