a. YW bisects the whole angle, thus angle XWY and angle ZWY are same
NOTE: REMEMBER TO WRITE THE LETTER ACCORDINGLY
b. the two triangles are congruent by AAS (angle-angle-side) thus the two legs of the the triangles are also congruent. when one is 9cm, the other is also 9cm.
c. Since the triangles are congruent, their sides also congruent.
