42/10 = 4.2
mm/10
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3 cm = 30 mm42/30 = 1.4
42mm
To compare 42MM and 10CM, we need to convert both measurements to the same unit. Since 1CM is equal to 10MM, 10CM is equivalent to 100MM. Therefore, 42MM is indeed larger than 10CM.
16.8 cm, i don't show my work
The lengths of the diagonals work out as 12 cm and 16 cm