Oblicz pole powierzchni prostopadłościanu o wymiarach :
a) 11m x 3m x 2m
b) 6,5dm x 2 dm x 2,5 dm
c) 8mm x 8mm x 8mm
d) 40 cm x 0,2 m x 5dm\
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a) P = 2 x (11m x 3m + 11m x 2m + 3m x 2m ) = 122 m kwadratowe
b)P = 2 x (6,5dm x 2 dm + 6,5 dm x 2,5 dm + 2 dm x 2,5 dm) = 68, 5 dm kwadratowe
c)P = 2 x ( 8mm x 8mm + 8mm x 8mm + 8mmx8mm) = 144 mm kwadratowe
d) 0,2 m = 20 cm 5 dm= 50 cm P= 2 x (40 cm x 20 cm + 40 cm x 50cm + 20cm x 50cm) = 7600 cm kwadratowych