Answer:
42mm
Step-by-step explanation:
For the perimeter of a shape you would add all the sides together. So in this case it would be:
7mm+7mm+7mm+7mm+7mm+7mm=42mm
The answer is D because you have to divide 812 by 25.3
It was about 17.4%
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% error=
actual value-estimated value
Then divide that by actual value