Question 964750
Find the perimeter of a square ABCD if two of the vertices are A(3,7) and B(-3,4).

I get 3sqrt5 x 4 sides = 12sqrt5 - - - is that right?
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If AB is a side, then side length = {{{sqrt(3^2 + 6^2) = sqrt(45) = 3sqrt(5)}}}
{{{P = 12sqrt(5)}}}
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You were close.