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Lesson Plan

Prove and apply relationships about the sides of parallelograms by using congruent triangles

teaches Common Core State Standards G.6E
teaches Common Core State Standards G.QP.1
teaches Common Core State Standards CCSS.Math.Content.HSG-CO.C.11

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Big Ideas: Prove that the opposite sides of parallelograms are congruent using congruent triangles. In this lesson students will work to prove a previously observed property of parallelograms. They will use their knowledge of transversals, parallel lines and congruent triangles to do so. Vocabulary: congruence, opposite sides, parallel, parallelogram Special Materials: None
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