Answer:
2. 

3. 
 - definition of perpendicular
4. 
 - all right angles are congruent
6. 
 
7. 
 
Explanation:
Given: Point P is the perpendicular bisector of AB
Prove: P is equidistant from the endpoints AB
Proof.
1. Point P is on the perpendicular bisector of AB - given
2.
 - definition of bisector
3. 
 - definition of perpendicular
4. 
 - all right angles are congruent
5. 
 - reflexive property of congruence
6. 
 - SAS congruency postulate
7. 
 - corresponding parts of congruent triangles are congruent
8. Point P is equidistant from the endpoints of AB - definition of equidistant