Particularly important is the perpendicular bisector of a segment, which, according to its name, meets the segment at right angles.
However, this problem only occurs when "is obtuse, and may be avoided by reflecting the triangle about the bisector of".
The angle bisector theorem is commonly used when the angle bisectors and side lengths are known.
Each point of an angle bisector is equidistant from the sides of the angle.
These include perpendicular bisector, circle through three points, circumcircular arc through three points, and conic section through five points.
In general, in heliostats, the bisector angular motion of the mirror moves at a rate that is 1/2 the angular motion of the sun.
Use of a span bisector analysis revealed that the star is not very active.
If one reflects a median in the angle bisector that passes through the same vertex, one obtains a symmedian.
