Odpowiedzi

2010-01-18T17:05:37+01:00
P=1/2 a * h
P=1/2 14cm * 20cm=7cm* 20 cm =140cm=1,4m
2010-01-18T17:06:29+01:00
Pole prostokątnego to a*b/2 =14*20/2=280/2=140cm²

a pole innego to a*h
2010-01-18T17:07:58+01:00
P= a*h / 2
p=14cm*20cm=280cm2/2 =140cm2
140cm2 = 1.40 m2
1 5 1