1. Section 1.5 Segment & Angle Bisectors 1/12

2. A Segment Bisector A B M k A segment bisector is a segment, ray, line or plane that intersects a segment at its midpoint. 2/12

3. A Midpoint ABM M is the midpoint of segment AB, if and only if, 3/12

4. An Angle Bisector  An angle bisector is a ray that divides an angle into 2 congruent adjacent angles. BD is an angle bisector of <ABC. B A C D * * 4/12

5. Example #1 ABM What is the value of x? AM = 7x + 7 MB = 35 cm 5/12

6. Example #2 x+40 o 3x-20 o * * What is the value of x? 6/12

7. Example #3 ABM What is the value of x? AM = 3x + 2 AB = 64 cm 7/12

8. Midpoint Formula 8/12

9. Midpoint Formula Example #1 Find the midpoint of segment AB with endpoints A(1, 3) and B (5, 11). 9/12

10. Midpoint Formula Example #2 Find the midpoint of segment AB with endpoints A(-1, 3) and B (6, -2). 10/12

11. Midpoint Formula Example #3 The midpoint of segment XY is M(3, -4). One endpoint is Y(-3, -1). Find the other endpoint. 11/12

12. Homework 1.5 P. 38 4 – 13, 44 - 49 12/12