Geometry Module 1, Topic B, Lesson 9

Learning Math

Student Outcome

  • Students write unknown angle proofs, which does not require any new geometric facts.  Rather, writing proofs requires students to string together facts they already know to reveal more information.

Downloadable Resources

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Common Core Learning Standards

CCLS State Standard
G.CO.9 Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a...

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