Oblicz pole powierzchni prostopadłościanu:
a)o podstawie kwadratu o boku 3cm i wysokości 7cm
b)o wymiarach 4m x 5m x 8m
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a)
Pp=2*(3*3)+ 4*(3*7)=2*9+4*21=18+84=102cm^2
b)
Pp=2*(4*5)+2*(4*8)+2*(5*8)= 2*20+2*32+2*40=40+64+80=184m^2
A)
a= 3cm h= 7cm
Pp= 2Pp + 4Pb
Pp= 2(3*3) + 2(3*7) = 2*9 + 2*21 = 18 + 42 = 60 cm3
B)
a=4cm b=5cm h=8cm
Pp=2Pp + 4Pb
Pp= 2(4*5) + 2(5*8) = 2*20 + 2*40 = 40 + 80 = 120 cm3