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Angle Bisector

A line or ray that divides an angle in half. For polygons, an angle bisector is a line that bisects an interior angle.

Note: The angle bisectors of a triangle are concurrent and intersect at the incenter.

 


Angle bisector of ∠ABC
(Click on the image or here to launch an interactive java applet)

 

See also

Incircle, centers of a triangle

 


  this page updated 27-aug-12
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes