Oblicz pole trojkata o podstawie 12 cm i wysokosci 0,8dm
Oblicz pole trapezu o podstawie 0,7dm, 30dm i wya 20cm
Oblicz pole rombu, o przekątnych
e=7 cm
f=8cm
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a=12cm
h=0,8dm=8cm
P=1/2*a*h
P=1/2*12*8=48 cm²
2.
a=0,7dm=7cm
b=30 dm=300cm
h=20cm
P=1/2(a+b)*h
P=1/2*307*20=307*10=3070 cm²
3.
e=7cm
f=8cm
P=ef/2
P=1/2*7*8=28 cm²