Point a is the point of concurrency of the angle bisectors of δdef. point a is the point of concurrency of triangle d e f. lines are drawn from each point of the triangle to point a. lines are drawn from point a to the sides of the triangle to form right angles and line segments a x, a y, and a z. the length of f a is 6 centimeters, the length of a d is 5 centimeters, the length of a x is 3 centimeters, and the length of y d is 4 centimeters. what is the length of za?