20 cm equals all these things:
2 decimetres
200 milimetres
.2 metres
and many other things.
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If you mean that the square has side equal to 20 cm, then the area is 20 x 20 = 400 square cm
No. 2 m = 200 cm
It is: 270 cm
Basically, yes: 20 centimeters is 7.87 inches.
20 mm, which is equal to 2 cm.