Oblicz pole powierzchni prostopadłościanu o wymiarach: 1m x 6m x 7m 4cm x 4 cm x 7cm 11cm x 9cm x 3cm 3m x 1 dm x 2m plis muszę mieć to na teraz
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a/ 1mx6mx7m
P=2·(1m·6m+6m·7m+1m·7m= 2(6m²+42m²+7m²)=2·55 m²=110 m²
b/ 4 cmx 4cm x 7 cm
P=2( 4 cm·4 cm+ 4 cm·7 cm+ 4 cm·4 cm)= 2( 16 cm²+ 28cm²+16 cm²)=2·60 cm²=
120 cm²
c/ 11 cm x9 cm x3 cm
P= 2( 11 cm·9 cm+ 9 cm·3 cm+ 11 cm·3 cm)= 2(99 cm²+21 cm²+33 cm²)=2· 153 cm²=
306 cm²
d/3m x1 dm x 2 m = 3 m x 10 m x 2 m
P= 2( 3m·10 m+ 10m·2 m+ 3 m·2 m)=2( 30 m²+20 m²+ 6m²)=2·56 m²=112 m²