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# section 3.3

### geometrystuff

Alternate Interior Angles
Theorem; If two lines intersect to form a linear pair of congruent angles, then the lines are_______ perpendicular
Theorem; If two sides of two adjacent acute angles are perpendicular, then they are _____. complementary
Theorem; If 2 lines are perpendicular, then they form ___ ___ _____. 4 right angles
If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are ______ congruent, alternate exterior angles theorem
if two parallel lines are cut by a transversal, then the pairs of alternate interior angles are ______. congruent, alternate interior angles theorem
If two parallel lines are cut off by a transveral, then the two consecutive interior angles are______. supplementary, Consecutive Interior Angles theorem
if two parallel lines are cut by a transveral, then the corresponding pairs of corresponding angles are ______. congruent, corresponding angles postulate
If the transversal is perpendicular to one the two parallel lines, then it is perpendicular to the other. Perpendicular transversal theorem.
If two lines are cut by a transversal so that alternate exterior angles are ____, then the lines are _________. congruent, parallel, alternate exterior angles Converse
If two lines are cut by a transversal so that alternate interior angles are _____, then the lines are ______. congruent, parallel, alternate interior angles converse
If 2 lines are cut by a transversal so that consecutive angles are _______, then the lines are _______. supplementary, parallel, consecutive interior angles
If two lines are cut by a transversal so that corresponding angles are _____, then the lines are _____. congruent, parallel, corresponding angles converse
Created by: bellesies