Angle Bisector - AngleBisector[]

Definition: An angle bisector is the line passing through the vertex of an angle that bisects the angle. More

In GeoGebra, angle bisectors can be defined in two ways (also see command AngleBisector):
Note: The direction vectors of all angle bisectors have length 1.

InterActivity: Directions

In the Algebra View (at left), click and leave your mouse on c to see the definition Line c:Angle bisector of A,B,C.

In the Graphics View (at right), click and drag points A, B or C and notice how the c always bisects \angle ABC .

Syntax	Tool	Mathcast	PDF	GGB	GGB Help
`AngleBisector[ <Point>, <Point>, <Point> ]`		SWF	PDF	GGB
Angle Bisector Selecting three points A, B, and C produces the angle bisector of the enclosed angle, where point B is the vertex.
`AngleBisector[ <Line>, <Line> ]`		SWF	PDF	GGB
Angle of given size *Selecting two lines produces their two angle bisectors (two new lines).
Mathcast: Construct Angle Bisector - Compass & Straightedge with GeoGebra