Oblicz pole powierzchni prostopadłościanu o wymiarach:
a) 6 cm, 7 cm, 5 cm: ................................................
b) 1 dm, 2 cm, 8 cm: ................................................
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a)
6 cm, 7 cm, 5 cm
a=6cm
b=7cm
c=5cm
P=2ab+2bc+2ac
P=2*6*7+2*7*5+2*6*5=84+70+60=214cm²
P=214cm²
b)
1 dm, 2 cm, 8 cm
a=1dm=10cm
b=2cm
c=8cm
P=2ab+2bc+2ac
P=2*10*2+2*2*8+2*10*8=40+32+160=232cm²
P=232cm²