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
Hemispheric line
a line or segment that is perpendicular to the given segment and divides it into two congruent segments
This line is called the midpoint of the segment. It is located exactly halfway between the endpoints of the segment, dividing it into two equal segments.
Angle bisector
the Equator
symmetry