2cm is equal to 20mm Likewise, 4cm is equal to 10mm Because these are measured in the metric system, they are nice and easy to convert. You can use this as a guide. 1km=1000m 1m=100cm 1cm=10mm
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4cm
Each side is 2cm
Assuming it is 4cm x 4cm, then there would be 16 1cm x 1cm squares. * * * * * But, there are also 9 2cm x 2cm squares, 4 3cm x 3cm squares and 1 4cm x 4cm square. That makes 30 in all.
Yes
radius is half the diameter. so 4cm.