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Converting between units for area

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Cut the square up

Why 1 cm² is 100 mm², not 101 cm = 10 mm1 cm = 10 mm1 mm²10 × 10 = 1001 cm² = 100 mm²100 × 100 = 10 0001 m² = 10 000 cm²The LENGTH factor gets squared for area.
10 across and 10 down — square the factor.
  1. 1Take a square of side 1 cm.