m ∠1 = m … October 10, 2011 theorem: proven statement Linear Pair Theorem: If two angles form a linear pair, then they are supplementary. Linear Pair Postulate. Given two triangles, if two sides and the angle between them are congruent, then the triangles are congruent. Substitution. Example: The m<5 must be between 0 and 180. Theorem 3-13 If two lines are perpendicular, then they intersect to form four right angles. 2.3 Line Intersection Postulate If two lines intersect, then their intersection is exactly one point. Sketch and label a linear pair. Definition of Congruence. Equality of Coorespondlng Angles Corresponding Angles Postulate, or C Postulate If two parallel lines are cut by a transversal, then corresponding angles are congruent.
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