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Altitudes, Medians, and Perpendicular Bisectors

Altitude Segment from a vertex of the triangle, perpendicular to the opposite side (or line containing the opposite side) of the triangle.
Perpendicular Lines Have slopes that are opposite reciprocals.
Point of Concurrency The point where three or more lines intersect.
Orthocenter Point of concurrency of the altitudes of a triangle.
Median Segment from a vertex of the triangle to the midpoint of the opposite side of the triangle.
Centroid The point of concurrency of the medians of a triangle.
Circumcenter Point of concurrency of the perpendicular bisectors of a triangle.
Incenter Point of concurrency of the angle bisectors of a triangle.
Inscribed Circle A circle inside a triangle where the incenter is the center of the circle and the radius is equal to the distance from the incenter to any of the three sides of the triangle.
Circumscribed Circle A circle that contains all the vertices of a polygon.
Created by: Lorri-Clue