Oblicz pola powierzchni prostopadłościanów o wymiarach:
a)2 cm x 4.5 cm x 3.5 cm
b)11 dm x 11 dm x 11 dm
c)35 mm x 4.7 cm x 0.2 dm
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4m * 7m * 2 + 2m *7m * 2 + 2m * 4m * 2 = 56m2 + 28m2 + 16m2 = 100m22cm * 4,5cm *2 + 4,5cm * 3,5 cm * 2 + 2cm * 3,5cm *2 = 18cm2 + 31,5cm2 + 14cm2 = 59cm2
11dm * 11dm * 6 = 121cm2 * 6 = 726
2,5cm * 4,7cm * 2 + 4,7cm * 2cm *2 + 2,5cm * 2cm *2 = 23,5cm2 + 18,8cm2 + 10cm2 = 52,3cm2
a) 100m2
b) 59 cm2
c) 52,3cm2