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Angle Bisector
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A line, ray, plane, or segment that bisects an angle in half.
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Segment Bisector
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A line, ray plane or segment that bisects a segment in half.
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Perpendicular Bisect Theorem
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If a point is on the perpendicular bisector of a segment then it is equidistance to the two end points of the segment.
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Perpendicular Bisect Theorem Converse
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If a point is equidistant to 2 end points of a segment then the point is on the bisector of the segment.
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Angle Bisect Theorem
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If a point is on the angle bisector, then it is equidistant from two sides of an angle, then it is on the angle bisector.
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Angle Bisector Converse Theorem
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If a point is equidistant from two sides of an angle, then it is on the angle bisector.
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Perpendicular Bisect of a Triangle
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A line, ray, or segment that is perpendicular to the side of the triangle at the midpoint of the side.
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Concurrent Lines
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Where three or more lines, rays, or segments at the same point.
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Median
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The distance of the vertex to the midpoints of the other side.
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Altitude
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An altitude of a triangle is the perpendicular segment from a vertex to the opposite side.
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Centroid
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Where three or more medians intersect at the same point.
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Orthocenter
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Where three or more altitudes intersect at the same point.
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Incenter
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Where three or more angle bisectors meet at the same point.
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Circumcenter
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Where three or more perpendicular bisectors meet.
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Property of Incenter
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The incenter is equidistant from the sides of the triangle
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