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This Construct an Equilateral Triangle (part 1) lesson plan also includes:
- Congruence, Proof, and Constructions - Module Overview (PDF)
- Congruence, Proof, and Constructions - Module Overview (Doc)
- Construct an Equilateral Triangle (part 1) (Doc)
- Construct an Equilateral Triangle (part 1) (PDF)
- Construct an Equilateral Triangle (part 1) (Doc)
- Assessment
- Answer Key
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Drawing circles isn't the only thing compasses are good for. For this first installment of a 36-part series, high schoolers learn how to draw equilateral triangles by investigating real-world situations, such as finding the location of a third cat in a room. They then compare their construction techniques with the steps Euclid described in his Elements.
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CCSS:
Designed
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Instructional Ideas
- Have class members work in pairs to discuss their ideas about finding the location of the third cat before sharing with the rest of the class
Classroom Considerations
- It's assumed that learners have little or no experience with compasses and straightedges
- Discussion of the relevant vocabulary could take more time than allotted; be sure to plan accordingly
Pros
- Resource has all necessary materials, including solutions to the problem set
- As with all EngageNY lessons, the teacher's guide is comprehensive and includes timing suggestions, as well as where to look for mathematical practices
Cons
- None