Geometric Conjectures
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122 CONJECTURES Discovering Geometry Teaching and Worksheet Masters ?2003 Key Curriculum Press Conjectures Chapter 2 C-1 Linear Pair Conjecture If two angles form a linear pair, then the measures of the angles add up to 180?. (Lesson 2.5) C-2 Vertical Angles Conjecture If two angles are vertical angles, then they are congruent (have equal measures). (Lesson 2.5) C-3a Corresponding Angles Conjecture, or CA Conjecture If two parallel lines are cut by a transversal, then corresponding angles are congruent. (Lesson 2.6) C-3b Alternate Interior Angles Conjecture, or AIA Conjecture If two parallel lines are cut by a transversal, then alternate interior angles are congruent. (Lesson 2.6) C-3c Alternate Exterior Angles Conjecture, or AEA Conjecture If two parallel lines are cut