## 8th math parallel lines and transversal angles

##### Created by:

mgwoodruff  on March 22, 2011

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# 8th math parallel lines and transversal angles

 complementary anglestwo angles with measures whose sum is 90 degrees
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#### Definitions

complementary angles two angles with measures whose sum is 90 degrees
supplementary angles two angles with measures whose sum is 180 degrees
vertical angles the non-adjacent angles formed when two lines intersect
corresponding angles when a transversal crosses two lines, these angles are in the same position at each intersection. They are congruent.
alternate interior angles angles that are between (or in the interior of) the two parallel lines and are on the opposied sides of the transversal. They are congruent.
alternate exterior angles angles that are on the outside of (or on the exterior of) the parallel lines and are on the opposite sides of the transversal. They are congruent.
180 degrees The sum of the angle measures of a triangle.
360 degrees the sum of the angle measures of a quadrilateral

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