Explore the property of angle bisector
Angle B is given and line c is the angle bisector of this angle (the red line). A point D is on the angle bisector. DE and DF are perpendicular to the sides of the angle.
- Move D on the angle segment. What do you notice about the measure of DF and DE?
- You can check the box next to "The measure of DF and DF" to see the measure of these two segments.
- Can you form a conjecture?
- You can change the measure of angle B by moving the point on the slide. Does your conjecture hold?