10 terms

midsegment

segment that connects the midpoints of two sides of a triangle

coordinate proof

A proof involving placing geometric figures in a coordinate plane.

perpendicular bisector

a line that is perpendicular to a segment at its midpoint.

equidistant

Equally distant from two points

circumcenter

the point of concurrency of the perpendicular bisectors of a triangle

incenter

the point of concurrency of the angle bisectors of a triangle

median of a triangle

a segment from a vertex to the midpoint of the opposite side

centroid

the point of concurrency of the medians of a triangle

altitude of a triangle

a perpendicular segment from a vertex to the line containing the opposite side

orthocenter

point of concurrency of the altitudes of a triangle