Bisect

"Bisect" means to divide into two equal parts.

We can bisect lines, angles and more.

The dividing line is called the "bisector".

Bisecting a Line Segment

Here the blue line segment is bisected by the red line:

bisect line

You can try it yourself (try moving the points):

images/geom-line.js?mode=bisect

When the bisector is perpendicular (at right angles) to the line being bisected it is called a "perpendicular bisector".

Line Bisector   See How To Bisect A Line Segment

Bisecting an Angle

Here the blue angle is bisected by the red line:

bisect angle

You can try it yourself (try moving the points):

images/geom-angle-bisect.js
Angle Bisector   See How To Bisect An Angle

Bisect a Shape

We can also bisect some shapes. Here a kite is bisected by a dashed line:

bisect kite