No it is 4.2 cm.
1 centimeter = 10 millimeters
1 millimeter = 0.1 centimeter
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One centimeter is exactly 10 millimeters. Therefor, 45 centimeters is exactly 450 millimeters. Both are the same.
centimeters are bigger. Every centimeter contains 10 millimeters.
There are 20 millimeters in 2 centimeters because if there are 10 millimeters in 1 centimeter and this metric system is based on 10 then if you count 10 times 10 it equals 20.
Yes they are. 1 centimeter is equal to 10 millimeters.
1 centimeter = 10 millimeters 600 centimeters = (600 x 10) = 6,000 millimeters