1. Prove the following result: If and m are two lines and there exist three distinct points P, Q,…

1. Prove the following result: If and m are two lines and there exist three distinct points P, Q, and R on m such that dP ,  D dQ,  D dR, , then either m D  or m  . 2. Let jBAC be an acute angle and let P and Q be two points on _'AB such that A _ P _ Q and AP D PQ. Prove that dQ,('AC _ 2dP ,('AC .