On a coordinate plane, kite U V W X with diagonals is shown. Point U is at (negative 2, 5), point V is at (5, 4), point W is at (8, negative 5), and point X is at (negative 1, negative 2).

Prove that the diagonals of kite UVWX are perpendicular.



Step 1: Determine the slope of XV.



The slope of XV is

.





Step 2: Determine the slope of UW.



The slope of UW is

.



Step 3: The slopes of the diagonals are

.



The diagonals of kite UVWX are

.