Solution:
Distance between two points
in two dimensional coordinate plane is given by:


As, Converse of Pythagorean theorem states that if sum of squares of any two adjacent sides in a triangle is equal to Square of length of third side, then the triangle is right angled triangle.
The true statement about the triangle XYZ is
1. XY measures √26units.
2. XYZ is an isosceles triangle.
3. XYZ is a right triangle.