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Oblicz pole prostopadłościanu o wymiarach 0,2 m;10 cm i 1,4 dm
0,2m = 20 cm
10 cm
1,4 dm = 14cm
Pc = 2 (20 * 10) + 2(10 * 14) + 2(20 * 14)
Pc = 400 + 280 + 560
Pc = 1240 cm2
b=10 cm =1dm
c= 1,4 dm
P=2*2*1+2*2*1,4+2*1*1,4=4+5,6+2,8=12,4dm²
b=10cm
c=1,4dm=14cm
V=a*b*c=20*10*14= 200*14= 2800cm
P= a*b*2 + a*c*2 +b*c*2= 20*10*2+20*14*2+10*14*2= 400+560+280=1240 cm²