Suppose we have angle PQR with P, Q, and R non-collinear, and ray QS distinct from ray QR such that angle PQS is congruent to angle PQR. Prove that if angle PQT is congruent to angle PQR, then either ray ray QR or ray ray QS.
In each diagram, BD bisects <ABC. Find m<ABC. (2x+20) (4x)