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18 Cards in this Set
 Front
 Back
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 56

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 57

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 58

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 59

the lines that contain the altitude of a triangle are congruent
