By looking at the current state of the question, the answer is associative property because that seems to be the only option present
Well to find distance subtract A. and B. from each other this should give you (340,370). Subtracting this is the quickest way to find range.
16x2=32
21x2=42
32+42=54
the perimeter is 54
I’m assuming you mean to round to the nearest tenth? If so, it’s 79.3. If that’s not what you’re asking i don’t know what else you mean
