# Angle Bisector Definition (I)

- Author:
- MsBuist, Tim Brzezinski

- Topic:
- Angles

In the applet below, the

**blue ray**is said to be an**angle bisector**of**angle**. The*BAC***gray slider**adjusts the entire measure of**angle**. The*BAC***black slider**dynamically illustrates what it means for a**ray**to**bisect**an angle. Interact with this applet for a few minutes, then answer the questions that follow.**Questions:**1) From what you've seen, describe what it means for a

**ray**to

**bisect**an angle. In your description, avoid using the words or phrases

*middle, down-the-middle, half*. If you need a hint, refer to terminology seen from this worksheet. 2) Use the

**Point on Object**tool to plot a point F anywhere on the

**angle bisector**. 3) Use the

**Angle**tool to find and display the measure of angle

*BAF*and

*CAF*. 4) Do these results reflect (i.e. illustrate) your response to (1)?

1) From what you've seen, describe what it means for a **ray** to **bisect** an angle.
In your description, avoid using the words or phrases *middle, down-the-middle, half.*

2) Use the **Point on Object** tool to plot a point F anywhere on the **angle bisector**.
3) Use the **Angle** tool to find and display the measure of angle *BAF* and *CAF*.
4) Do these results reflect (i.e. illustrate) your response to (1)?