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This Proof of the Pythagorean Theorem lesson plan also includes:
- Proof of the Pythagorean Theorem (.docx)
- Proof of the Pythagorean Theorem (.pdf)
- Proof of the Pythagorean Theorem (.docx)
- Grade 8 Module 3: Teacher Materials (.pdf)
- Grade 8 Module 3: Student Materials (.pdf)
- Grade 8 Module 3: Copy Ready Materials (.pdf)
- Pythagorean Theorem proof from similar right triangles
- Answer Key
- Join to access all included materials
What does similarity have to do with the Pythagorean Theorem? The activity steps through the proof of the Pythagorean Theorem by using similar triangles. Next, the teacher leads a discussion of the proof and follows it by an animated video. Finally, pupils use the Pythagorean Theorem to find missing sides of right triangles.
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CCSS:
Designed
Concepts
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Instructional Ideas
- Create the triangles used in the proof and cut them out so the class can manipulate them and move them to the same orientations
Classroom Considerations
- The standard 8.G.B.6 is a post-test standard for New York, but may not be for other areas
- Individuals need to know how to find square roots of perfect squares
Pros
- Teacher notes provide insights on different approaches to do the proof, helping make the concept clearer to students
- Answer key shows the algebraic steps required to arrive at the solution
Cons
- None