1 mm is 1/10 of a cm, so 1 mm2 is 1/100 of a cm2.
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1 cm = 10 mm so 1 cm2 = 10*10 mm2 So 80.2 cm2 = 80.2 * 100 mm2 = 8020 mm2
1 m2 = 1,000,000 mm2
1 m is 1,000 mm (one thousand mm).Therefore 1 m2 = (1 m) x (1 m) = (1,000 mm) x (1,000 mm) = 1,000,000 mm2.So, there are 1,000,000 mm2 (one million mm2) in 1 m2.
1 metre = 100 cm so 1 m2 = 100 cm*100cm = 10000 cm2 So, 0.01 m2 = 0.01*10000 = 100 cm2