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Lesson 5.3 Notes. Use Angle Bisectors of Triangles. Defintions /Review. Angle Bisector- A ray that bisects an angle into two adjacent angles. In order to measure the distance, you have to measure perpendicularly. Theorem 5.5 Angle Bisector Theorem.
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Lesson 5.3 Notes Use Angle Bisectors of Triangles
Defintions/Review • Angle Bisector- A ray that bisects an angle into two adjacent angles. • In order to measure the distance, you have to measure perpendicularly.
Theorem 5.5 Angle Bisector Theorem • If AD bisects BAC and DB AB and DC AC, then DB = DC B B A D D A C C Theorem 5.6 Angle Bisector Converse If DB AB and DC AC and DB = DC, then AD bisects BAC
Theorem 5.7Concurrency of Angle Bisectors Point P is the Incenter and is equidistant from the sides. B If BP, AP, & CP are angle bisectors then DP = EP = PF D E P C A F