Why is it important to convert rates to the same units before comparing them

Rate is used to compare values of the same unit. So, it is important to convert rates to the same units so that the units can cancel out.

The answer for this is 9/1253decimal form 0.007

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's