Triangle ABC is a right triangle with right angle at A. Suppose AX is an altitude of the triangle, AY is an angle bisector of the triangle, and AZ is a median of the triangle, and angle XAY=13. If X is on BY, then what is the measure of angle ZAC?
Z is the circumcenter of Triangle ABC , so \(\angle YAZ = \angle XAY\) (very useful fact in geometry). Thus also Triangle ZAC=0, then we have \(\triangle ABC \sim \triangle XAC \implies 2 \theta = ?\)