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This Copy and Bisect an Angle lesson plan also includes:
- Congruence, Proof, and Constructions - Module Overview (PDF)
- Congruence, Proof, and Constructions - Module Overview (Doc)
- Copy and Bisect an Angle (Doc)
- Copy and Bisect an Angle (PDF)
- Copy and Bisect an Angle (Doc)
- Copy and Bisect an Angle (PDF)
- Copy and Bisect an Angle (Doc)
- Assessment
- Answer Key
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More constructions! For this third installment of a 36-part series, learners watch a YouTube video on creating door trim to see how to bisect an angle. They then investigate how to copy an angle by ordering a given list of steps.
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CCSS:
Designed
Concepts
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Instructional Ideas
- Point out window or door trims (if any) in the classroom and have learners consider how these frames are made before showing the video clip
Classroom Considerations
- A class set of scissors is required for Mathematical Modeling Exercise Two
- It's possible that the introductory portion of the lesson (Geometry Assumptions) could take longer than indicated, especially if class members have not had previous formal geometry instruction
Pros
- Investigations allow learners to develop their own ideas rather than simply being provided with a complete list of steps for constructions
- Lesson begins with the simpler task of bisecting an angle, then progresses to the more difficult construction of copying an angle
Cons
- The problem set includes four angles to bisect, but only one angle to copy; some additional practice may be beneficial