The easiest way to work this is to draw it on graph paper.
AB=5, a 3-4-5 triangle.
The other 2 sides are sqrt(17) and sqrt(26).
So approximately, the perimeter is a little more than 14.
Jackson J.
asked • 09/30/20△ABC has vertices at A(3,4), B(−1,1), and C(−2,5). What is the approximate perimeter of △ABC?
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