Special Pairs of Angles

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Special Pairs of Angles : 

Special Pairs of Angles Lesson 8-3

Complementary Angles : 

Complementary Angles If the sum of the measures of two angles is exactly 90º then the angles are complementary.

Supplementary Angles : 

Supplementary Angles If the sum of the measures of two angles is exactly 180º then the angles are supplementary.

Vertical Angles : 

Vertical Angles Vertical angles are formed by two intersecting lines. They are the angles that are opposite each other. Vertical angles are congruent (they have equal measures). In this picture, <1 and <3 are vertical angles. What is the measure of <2? <2 is 120º because it is congruent to the vertical angle across from it.

Transversals : 

Transversals A transversal crosses two or more lines at different points: Interior angles are on either side of a transversal between a pair of lines. Exterior angles are on either side of a transversal outside of a pair of lines. Angles 3,4,5, and 6 are interior angles. Angles 1,2,7, and 8 are exterior angles.

Homework Time! : 

Homework Time!

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