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This Ptolemy's Theorem lesson plan also includes:
- Geometry Module 5: Teacher Materials
- Geometry Module 5: Student Materials
- Geometry Module 5: Copy Ready Materials
- Geometry Module 5, Topic E Overview
- Geometry Module 5, Topic E, Lesson 21: Teacher Version (Doc)
- Geometry Module 5, Topic E, Lesson 21: Student Version (PDF)
- Geometry Module 5, Topic E, Lesson 21: Student Version (Doc)
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Everyone's heard of Pythagoras, but who's Ptolemy? Learners test Ptolemy's Theorem using a specific cyclic quadrilateral and a ruler in the 22nd installment of a 23-part module. They then work through a proof of the theorem.
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CCSS:
Designed
Concepts
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Instructional Ideas
- Use the problem set to help review concepts in this lesson and previous lessons in preparation for the end-of-module assessment
Classroom Considerations
- Exploratory challenges require additional materials
- Lesson incorporates different aspects of mathematics, such as the Pythagorean Theorem, trigonometry, rigid motions, and area formulas
Pros
- Teacher resource provides scaffolding tips
- Includes leading questions to guide learners through a proof of Ptolemy's Theorem
Cons
- The resource contains minor typographical errors throughout