ANGLE BISECTOR the relative lengths of the two segments that a triangle's side is divided into by a line that bisects the opposite angle
SEGMENT ADDITION POSTULATE states that if we are given two points on a line segment, A and C, a third point B lies on the linesegment AC if and only if the distances between the points meet the requirements of the equation AB + BC = AC.
CONGRUENT ANGLES are angle with the same angle measurement.
