The figure shows triangle pqr and line segment ab, which is parallel to qr: triangle pqr has a point a on side pq and point b on side pr. the line ab is parallel to the line qr. part a: is triangle pqr similar to triangle pab? explain using what you know about triangle similarity. (5 points) part b: which line segment on triangle pab corresponds to line segment qr? explain your answer. (3 points) part c: which angle on triangle pab corresponds to angle q? explain your answer. (2 points)