Odpowiedź:
a)4 cm x 7 cm x 2 cm
4*7*2+7*2*2+4*2*2=56+28+16=100cm²
b) 2 cm x 4,5 cm x 3,5 cm
2*4,5*2+4,5*3,5*2+2*3,5*2=18+31,5+14=63,5cm²
C) 11 dm x 11 dm x 11 dm
11*11*2+11*11*2+11*11*2=242+242+242=726dm²
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2*4=6:3=2 (dodaj ,5 i ,5 czyli 3cm)
11+11=22:11=2 dm
Odpowiedź:
a)4 cm x 7 cm x 2 cm
4*7*2+7*2*2+4*2*2=56+28+16=100cm²
b) 2 cm x 4,5 cm x 3,5 cm
2*4,5*2+4,5*3,5*2+2*3,5*2=18+31,5+14=63,5cm²
C) 11 dm x 11 dm x 11 dm
11*11*2+11*11*2+11*11*2=242+242+242=726dm²