# Geometry theorems 1.txt

 The flashcards below were created by user platypie8 on FreezingBlue Flashcards. Segment addition postulate AB + BC = AC triangle sum theorem all angles in a triangle add up to 180 degrees vertical angle theorem vertical angles are congruent. angle addition postulate if angle 3 is made of angles 1 and 2, angle 1 plus angle 2 = angle 3 linear pairs if 2 angles are linear pairs, they are supplementary alternate interior angle theorem if two parallel lines are cut by a transversal, the pairs of alternat interior angles are congruent. alternate exterior angles theorem if two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent. same-side interior angles theorem if two parallel lines are cut by a transversal, then the two pairs of same-side interior angles are supplementary. common segments theorem AB = CD, then AC = BD converse corresponding angles postulate if two coplanar lines are cut by a transversal so that a pair of corresponding angles are congruent, then the two lines are parallel purpose of converse of angle theorems: convert from equal angles to parallel lines Perpendicular transversal theorem: in a plane, if a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other line. dual perpendicular theorem if two coplanar lines are perpendicular to the same line, then the two lines are parallel to each other. Right angle congruence theorem all right angles are congruent congruent compliments theorem if two angles are complementary to the same angle, the two angles are congruent. congruent supplements theorem if two angles are supplementary to the same angle, the two angles are congruent. Authorplatypie8 ID41842 Card SetGeometry theorems 1.txt DescriptionProofs Theorems One Updated2010-10-13T05:27:58Z Show Answers