Question

Determine if triangle XYZ with coordinates X(1, 1), Y(5, 6), and Z(6, 2) is a right triangle. Use evidence to support your claim.

Answer 1

I know it's a right triangle, but I don't know how to prove it.

Answer 2

You would find the lengths of the of right triangle and you can then check if they approve by using the Pythagorean theorem....

http://www.virtualnerd.com/algebra-1/radical-expressions-equations/right-triangle-determination-from-sides.php

Answer 3

@beanpet