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The Backpage: My Favorite Lesson
The Back Page: My Favorite Lesson: Indirect Proofs

Paul J. Henley Edited by Paul Vicinus 

May 2012, Volume 105, Issue 9, Page 720

Abstract:
The importance of indirect proof is discussed, and a real-world example is used as an illustration.

Keywords:
Algebra
Grades 9-12
Journal
Lesson Plans
Teacher
Reasoning and Proof