12. The following statements are correct about angle bisector EXCEPT one.

a. An angle bisector is a line that contains the midpoint of that side and is perpendicular to that side.


b. An angle bisector of a triangle is a segment that separates an angle of the triangle into two equal angles

c. One of the endpoints of an angle bisector is a vertex of the triangle, and the other endpoint is on the side opposite that vertex

d. Every triangle has three angle bisectors​