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13 Cards in this Set
 Front
 Back
triangle inequality theorem

the sum of the lengths of any 2 sides of a triangle must be greater than the 3rd side


altitude

a segment from a vertex to a poin on the opposite side forming a right angle


orthocenter

where all 3 altitudes meet, altitudes creat 3 sets of similar triangles


angle side relationships

the wider the angle, the longer the opposite side


hinge theorem

if 2 sides of a tringle are congrient to 2 sides of another triangle and the inclused angle of the 1st is larger than the included angle of the 2nd, then the 3rd side of the 1st is longer than the 3rd side of the 2nd


incenter

where all the angle bisectors meet


midsegment theorem

the segment connecting the midpoints of 2 sides of a triangle is parallel to the 3rd side and 1/2 its length


median

segment with 1 endpoint at a vertex and the other enpoint on the midpoint of the opposite side


midsegment

a segment which connects the midepoints of 2 sides of a triangle


angle bisector theorem

if a point is on the bisector of an angle, then it is equidistant from the 2 sides of the angle


centriod

where all the medians meet, center of gravity for a triangle


circumcenter

where all of the perpindularr meet, the circumcenter is equidistant from every corner


perpindicular bisector theorem

if a point is on the perpindicular bisector of a segment, then it is equidistant from the endpoints of the segment
