Which statement proves that triangle XYZ is an isosceles right triangle?
A
The slope of line segment XZ is 3 fourths , the slope of line segment XY is negative 4 thirds , and XZ is equal to XY is equal to 5 .B
XZ is equal to XY is equal to 5C
The slope of line segment XZ is 3 fourths , the slope of line segment XY is negative 4 thirds , and the slope of line segment ZY is equal to 7 .D
line segment XZ perpendicular to line segment XY