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The Angle Trisector

In the figure below, |

*AB*| = |

*BD*| = |

*CD*|. Move point

*P* and observe the figure.

- What kind of triangle is triangle
*BDC*?
- Make a conjecture about the relationship between angle
*PDC* and angle *PAB*.
- Verify your conjecture by clicking the
*Show Angles Measures* check box.
- Challenge: Prove your conjecture

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