Question

Oblicz pole powierzchni prostopadłościanu o wymiarach :
a ) 1 m x 6 m x 7 m. b ) 4 cm x 4 cm x 7 cm.
c ) 11 cm x 9 cm x 3 cm. d ) 3 m x 1 dm x 2 m

Answer 1

A)
a=1m
b=6m
c=7m
Pc=2ab+2bc+2ac
Pc=2*1m*6m+2*6m*7m+2*1m*7m
Pc=12m2+84m2+14m2=110m2
b)
a=4cm
b=4cm
c=7cm
Pc=2ab+2bc+2ac
Pc=2*4cm*4cm+2*4cm*7cm+2*4cm*7cm
Pc=32cm2+56cm2+56cm2=144cm2
c)
a=11cm
b=9cm
c=3cm
Pc=2ab+2bc+2ac
Pc=2*11cm*9cm+2*9cm*3cm+2*11cm*3cm
Pc=198cm2+54cm2+66cm2=318cm2
d)
a=3m=30dm
b=1dm
c=2m=20dm
Pc=2ab+2bc+2ac
Pc=2*30dm*1dm+2*1dm*20dm+2*30dm*20dm
Pc=60dm2+40dm2+1200dm2=1300dm2