Description
On the second day of unknown angle proofs, students incorporate the use of constructions, specifically auxiliary lines, to help them solve problems. In this lesson, students refer to the same list of facts they have been working with in the last few lessons. What sets this lesson apart is that necessary information in the diagram may not be apparent without some modification.
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Credits
From EngageNY.org of the New York State Education Department. Geometry Module 1, Topic B, Lesson 10.
Available from engageny.org/resource/geometry-module-1-topic-b-lesson-10; accessed 2015-05-29.
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