Applications of the Pythagorean Theorem: Lesson

This Applications of the Pythagorean Theorem: Lesson video also includes:

The Pythagorean Theorem works for something other than right triangles; show your class all it can do. Using information from the Pythagorean Theorem, the video shows how to determine whether a triangle is an acute or obtuse triangle. Part of a large geometry playlist, the video uses the Pythagorean Theorem to find the distance between two points and introduces the distance formula.

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CCSS: Adaptable
Instructional Ideas

  • Conduct a mini-lesson to derive the distance formula from the Pythagorean Theorem
  • Struggling learners may benefit from the reverse of the rule to classifying triangles by putting C squared first
Classroom Considerations

  • Pupils should know the classifications of triangles

  • Links to more CK-12 Pythagorean Theorem application resources
  • Provides worked examples

  • The last summary of the rule to classify triangles is incorrect, square each quantity instead
Common Core