Zad.1
Olicz pole powierzchni prostopadłościanu o wymiarach :
a) 2m x 7m x 8m
b) 5cm x 3cm x 8cm
c) 11cm x 9 cm x 3 cm
d) 3m x 1dm x 2m
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a)P= 2*(2*7)+2*(7*8)+2*(8*2)=28+112+32=172 m2
b)P=2*(5*3)+2*(5*8)+2*(8*3)=30+80+48=158 cm2
c)P=2*(11*9)+2*(11*3)+2*(9*3)=198+66+54=318 cm2
d) 3 m = 30 dm 2 m= 20 dm
P=2*(30*1)+2*(30*20)+2*(1*20)=60+1200+40=1300 dm2
a)
P=2(2·7)+2(7·8)+2(8·2)=28+112+32=172m²
b)
P=2(5·3)+2(5·8)+2(8·3)=30+80+48=158cm²
c)
P=2(11·9)+2(11·3)+2(3·9)=198+66+54=318cm²
d)
P=2(30·1)+2(1·20)+2(20·30)=60+40+1200=1300dm²=13m²