3. Write a formal proof for the following tiheorem. Include given and prove statements, a drawing, and the proof itself. If the exterior sides of two adjacent angles form a straight line, then these angles are supplementary.

Elementary Geometry For College Students, 7e
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ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter2: Parallel Lines
Section2.CR: Review Exercises
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3.
Write a formal proof for the following theorem. Include given and prove statements, a drawing, and the
proof itself.
If the exterior sides of two adjacent angles form a straight line, then these angles are supplementary.
Transcribed Image Text:3. Write a formal proof for the following theorem. Include given and prove statements, a drawing, and the proof itself. If the exterior sides of two adjacent angles form a straight line, then these angles are supplementary.
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