CK-12 Geometry-Concepts

3.5. Alternate Exterior Angles http://www.ck12.org

2. Give THREE examples of pairs of alternate exterior angles in the diagram below:

Answers:

1. The given angles are alternate exterior angles. Because the lines are parallel, we can set the expressions equal to
   each other to solve the problem.

( 3 y+ 53 )◦= ( 7 y− 55 )◦

108 ◦= 4 y

27 ◦=y

Ify= 27 ◦, then each angle is 3( 27 ◦)+ 53 ◦, or 134◦.

2. There are many examples of alternate exterior angles in the diagram. Here are some possible answers:
   -^6 1 and^614
   -^6 2 and^613
   -^6 12 and^613

Interactive Practice

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