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### 18 Cards in this Set

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 midsegment the segment connecting the midpoint of 2 sides of a triangle Triangle Midsegment Theorem if a segment joins the midpoints of 2 sides of a trianlge, then the segment is parallel to the 3rd side and half its length perpendicular bisector theorem if a point lies on the perpendicular bisector of a segment, the it is equidistant from the endpoints of the segment c. of perpendicular bis. theorem if a point is equidistant from the endpoints of the segment, then its on the perpendicular bisector of a segment distance from a point to a line the length of the perpendicular segment from the point to the line angle bisector theorem if a point is on the bisector of an angle, then it is equidistant from the sides of the angle c. of anvlge bis. theorem if a point is equidistant from the sides of an angle, then it is on the angle bisector concurrent when 3 or more lines intersect in 1 point point of concurrency a point of intersection of a set of 3 ore more lines or segments circumcenter the point of concurrency of the perpendicular bisectors theorem 5-6 the perpendicular bisectors of the sides of a triangle are concurrent at a point equidistant from the vertices incenter the point of concurrency of the angle bisectors of a triangle theorem 5-7 the angle bisectors of a trianlge are concurrent at a point equidistant from the sides median a segment whose endpoints are at a vertex and the midpoint of the opposite side centroid the point of concurrency of 3 medians theorem 5-8 the medians of a triangle are concurrent at a point that is 2/3 the distance from each vertex to the midpoint of the opposite side altitude the perpendicular segment from a vertex of an angle to the line containing the opposite side theorem 5-9 the lines that contain the altitude of a triangle are congruent