Lesson plan

Prove the Pythagorean identity sin^2(x) + cos^2(x) = 1 by analyzing similar right triangles

teaches Common Core State Standards HSF-TF.C.8 http://corestandards.org/Math/Content/HSF/TF/C/8
teaches Common Core State Standards HSG-SRT.C.8 http://corestandards.org/Math/Content/HSG/SRT/C/8
teaches Common Core State Standards MP8 http://corestandards.org/Math/Practice/MP8

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