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H=10 cm
obliczam Pp
Pp=1/2(a+b)*h
Pp=1/2(4+3)*2=7cm2
obliczam V
V=1/3 Pp*H
V=1/3 7*10=70/3 cm3=23 1/3 cm3
V=7*10:3=70:3=23,3cm3