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Lesson Plan

The Pythagorean Theorem

Curated and Reviewed by Lesson Planet

There isn't a more popular geometry formula than the Pythagorean Theorem! Learners understand the special side relationships in a right triangle. They use the Pythagorean Theorem to find missing sides and to solve problems. They begin working with the trigonometric ratios as well. 

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CCSS: Adaptable
Concepts
pythagorean theorem, right triangles, trigonometric ratios, sine, cosine, tangent, problem solving strategies
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Additional Tags
math
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Instructional Ideas
  • Use practice problems for board work to allow for frequent checks for understanding
Classroom Considerations
  • Learners should be familiar with solving simple quadratic equations using square roots
  • The fourth in a 16-part series
Pros
  • Uses context to introduce the Pythagorean Theorem, making it easier for pupils to grasp
  • Shows detailed worked-out solutions for each example
Cons
  • Does not use exact answers; any nonperfect square is written as a decimal
Common Core
HSG-SRT.C.8