You didn't give us the picture but here's some info on bisectors
An angle bisector of a triangle is a segment, ray or line which divides an angle of the triangle into two congruent (equal in measure) parts. Since all triangles have three angles, all triangles have three angle bisectors.
The three angle bisectors of the angles of a triangle meet in a single point, called the incenter . Here, I is the incenter of ΔPQR . The incenter is equidistant from the sides of the triangle. That is, PI=QI=RI .
