SOLUTION: Decide whether or not the points are the vertices of a right triangle. (-9,-3), (-3,-1), (1,-13)

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Question 263632:
Decide whether or not the points are the vertices of a right triangle.
(-9,-3), (-3,-1), (1,-13)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: There are two ways to do this. One way is to find the slopes of all of the lines and see if any two slopes are perpendicular to one another. Another way to do it is to find the distances between each pair of points and see if the squares of two distances add to a square of another distance (ie use the converse of the pythagorean theorem).