# Shared Flashcard Set

## Details

Chapter 5: Properties of Triangles
HS Geometry vocabulary related to triangle properties
13
Mathematics
11/11/2011

Term
 Perpendicular Bisector
Definition
 A segment (or line, ray, or plane) that is perpendicular to a segment at its midpoint.
Term
 Equidistant
Definition
 Having the same distance from two points or lines.
Term
 Concurrent Lines
Definition
 When three or more lines (or rays or segments) intersect at the same point.
Term
 Point of Concurrency
Definition
 The point of intersection of three or more concurrent lines.
Term
 Circumcenter of a triangle
Definition
 The point of concurrency of the three perpendicular bisectors of a triangle.
Term
 Angle Bisector of a Triangle
Definition
 A bisector of an angle of the triangle.
Term
 Incenter of the Triangle
Definition
 The point of concurency of the three angle bisectors of a triangle.
Term
 Median of a Triangle
Definition
 A segment in a triangle whose endpoints are a vertex of the triangle and the midpoint of the opposite side.
Term
 Centroid of a Triangle
Definition
 The point of concurrency of the three medians of the triangle.
Term
 Altitude of a Triangle
Definition
 The perpendicular segment from a vertex to the opposite side or the line that contains the opposite side.
Term
 Orthocenter of a Triangle
Definition
 The point of concurrency of the three altitudes of a triangle.
Term
 Midsegment of a Triangle
Definition
 A segment that connects the midpoints of two sides of a triangle.
Term
 Indirect Proof
Definition
 A proof in which you prove that a statement is true by first assuming that its opposite is true.
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