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Pp=a*h/2= 5*12/2= 30 cm2
Pb= 5*8= 40 cm2
Pb= 12*8= 96 cm2
Pb= 13*8= 104 cm2
Pc= 2*30+40+96+104= 300 cm2
V=Pp*H
V= 30*8=240 cm3
2) Pp= e*f/2= 6*8/2=24 dm2
Pb= 10*5=50 dm2
Pc= 2*24+4*50= 48+200= 248 dm2
V= 24*10= 240dm3
3) P trapezu= (a+b)*h/2= (14+26)*8/2= 160 cm2
Pp= 2*160= 320 cm2
Pb=15*10=150 cm2
Pc= 2*320+4*10*15+2*14*15= 640+600+420= 1660 cm2
V= 320*15= 4800 cm2
Mam nadzieję, że pomogłam. :) Liczę na naj. ;)