A bisecting line.
An angle is divided in half by the angle bisector. A line segment is divided in half by a midpoint.
Every line bisector divides a line into two halves: by definition!
A point that divides a segment into two segments of equal length is a midpoint.
It is its midpoint
To bisect is to cut or divide into halves. A bisecting line would then be a line that divides another line in half or a line that divides an angle in half.
The mid-point
The line that divides the Earth in half horizontally is known as the Equator. It is located at 0 degrees latitude and divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
It is a line of symmetry.
Hemispheric line
Angle bisector
It is a bisector.
symmetry