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16 Cards in this Set
 Front
 Back
perpendicular bisector

a segment, ray or plane that is perpendicular to a segment at its midpoint


equidistant from two points

the same distance from one point as from another point


distance from a point to a line

the length of the perpendicular segment from the point to the line.


equidistant from two lines

the same distance from one line as from another line


perpendicular bisector of a triangle

a line ray or segment that is perpendicular to a side of a triangle at the midpoint of the side


concurrent lines

three or more lines that intersect in the same point


point of concurrency

the point of intersection of concurrent lines


circumcenter of a triangle

the point of concurrency of the perpendicular bisectors of a triangle


angle bisector of a triangle

a bisector of an angle of the triangle


incenter of a triangle

the point of concurrence of the angle bisectors triangle


median of a triangle

a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side


centroid of a triangle

the point of concurrency of the medians of a triangle


altitude of a triangle

the perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side


orthocenter of a triangle

the point of concurrency of the lines containing the altitudes of a triangle


midsegment of a triangle

a segment that connects the midpoints of two sides of a triangle


indirect proof

a proof in which you prove that a statement is true by first assuming that its opposite is true. if this assumption leads to an impossibility then u have proved that the original statement is true
