oblicz pole powierzchni prostopadloscianow o wymiarach : a) 4 m x 7 m x 2 m b) 2 cm x 4,5 cm x 3,5 cm c) 11 dm x 11 dm x 11 dm d)25 mm x 4,7 cm x 0,2 dm
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a)Pc= 2*4*7+2*4*2+2*7*2=56+16+28=100m²
H= 2
b) Pc= 2*2*4,5+2*2*3,5+2*4,5*3,5= 18+14+31,5=63,5cm²
H= 3,5
c) Pc= 2*11*11+2*11*11+2*11*11= 242+242+242=726dm²
H= 11
d) 25 mm= 2,5 cm
0,2dm= 20 cm
H= 20 cm
Pc= 2*2,5*4,7+2*2,5*20+2*4,7*20= 23,5+100+188=311,5cm²