Section 1b: Angle Bisector
Directions for Using the Applet:
1. Look at the triangle in the applet. Focus on ∠BAC, the angle at the top.
2. You will see two sliders:
- The gray slider adjusts the size of the entire angle.
- The black slider shows how the blue ray divides the angle.
- Slide both sliders back and forth.
- Observe how the blue ray interacts with the angle as the sliders move.
- These angles should help you better understand what it means to bisect an angle.
Questions to Answer (Write in Complete Sentences):
1. Based on your observations, what does it mean for a ray to bisect an angle? Do not use words like “middle,” “half,” or “down the middle.” Explain clearly in your own words.
2. After measuring ∠BAF and ∠CAF: a. What did you notice about the two angles? b. How does this support your answer to the first question?