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13 Cards in this Set
 Front
 Back
acute angle

angle with a measure of greater than 0° and less than 90°

obtuse angle

angle with a measure of greater than 90° and less than 1800°

right angle

angle with a measure of 90°

straight angle

angle with a measure of 180°

complementary angles

2 angles when added = 90°

supplementary angles

2 angles when added = 180°

vertical angles

2 angles opposite from each other with a common vertex

parallel lines

2 lines that NEVER intersect

perpendicular lines

2 lines that intersect @ 90°

transversal

a line that intersects two or more lines at different points

corresponding angles

angles in the same location at the intersection of 2 parallel lines & a transversal which are congruent

alternate interior angles

angles that are inside 2 parallel lines but diagonal across the transversal, which are congruent

alternate exterior angles

angles that are outside 2 parallel lines but diagonal across the transversal, which are congruent
