Description
This is the third lesson in the congruency topic. So far, students have studied the SAS triangle congruence criteria and how to prove base angles of an isosceles triangle are congruent. Students examine two more triangle congruence criteria in this lesson: ASA and SSS. Each proof assumes the initial steps from the proof of SAS; ask students to refer to their notes on SAS to recall these steps before proceeding with the rest of the proof. Exercises require using all three triangle congruence criteria.
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From EngageNY.org of the New York State Education Department. Geometry Module 1, Topic D, Lesson 24.
Available from engageny.org/resource/geometry-module-1-topic-d-lesson-24; accessed 2015-05-29.
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