Point of concurrencey		A ray that divides an angle into two adjacent angles that are congruent
Median		The perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side
Circumcenter		The point of concurrency of the angle bisectors of a triangle
Midpoint		A segment, ray, line, or plane that is perpendicular to a segment at its point
Centroid		The point of intersection of concurrent lines
Itersect		Two lines that intersect to form a right angle
Perpendicular lines		A segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side
Perpendicular bisector		The point of concrurrency of the median of a triangle
Orthorcenter		The point of concurrency of the lines containing the altitudes of a triangle
Concurrent lines		The point that divideds, bisects, a segment into two congruent segments
Angle bisector		To have one or more points in common
Midsegment		Three or more lines that intersect in the same point
Incenter		The point of concurrency of the perpendiculare bisectors of a triangle
Angle bisector		A ray that divides an angle into two adjecent angles that are congruent
Altitude		A segment that connects the midpoints of two sides of a triangle