1. Module 15: Lesson 5 Angle Bisectors of Triangles
Vocabulary
An angle bisector is a line or line segment that bisects an angle.
The definition of the distance between a point and a line is the length of the perpendicular segment from the point to the line.

2. Angle Bisector Theorem
If a point is on the perpendicular bisector of an angle, then it is equidistant from the sides of the triangle.

3. Converse of the Angle Bisector Theorem
If a point in the interior of an angle is equidistant from the sides of the angle, then it is on the bisector of the angle.

4. If AD = 12.8, what is CD?

5. The location where all 3 angle bisectors of a triangle intersect is called the incenter of the triangle.

6. Incenter Theorem
The angle bisectors of a triangle intersect at a point that is equidistant from the sides of a triangle.

7. K V W J L

8. Q X P R Y

9. Homework pages 781-786 #’s 2-17, 21 (all)