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. if it is not a right triangle, what changes can be made to make it a right triangle? be specific.

The question is asking to calculate the said coordinates and determine if it is a right triangle or not and state the evidence why and in my own calculation and further understanding about the said coordinates, I would say that its not and the Z coordinates should be (6,1). Hope this would help 

40 & 50 in the right corner are the complementary angles as when placed in a sum (added together) they make 90°