Odpowiedź:
1.
P = a•ha
a = 2cm
h = 1,5cm
P = 2 • 1,5
P = 3 [cm2]
2.
P = 1/2•a•h
a = 2,5cm
h = 2cm
P = 1/2•2,5•2
P= 1,5 [cm2]
3.
P = 1/2•(a+b)•h
a=2,5cm
b=1,5cm
h=2,5cm
P=1/2•(2,5+1,5)•2,5
P=5 [cm2]
4.
P= 1/2•a•h
a=2cm
h=3cm
P= 1/2•2•3
P=3 [cm2]
5.
P= 1/2•d1•d2
d1=3cm
d2=2cm
P=1/2•3•2
