Investigating Special Right Triangles

This Investigating Special Right Triangles lesson plan also includes:

Scholars first investigate relationships in the side lengths of 30°-60°-90° triangles and 45°-45°-90° triangles. This knowledge then helps them solve problems later in the lesson about special right triangles.

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Instructional Ideas

  • Have pupils research real-life uses of special right triangles 
Classroom Considerations

  • Learners need to be proficient with the Pythagorean Theorem, including using variables as lengths
  • Lesson can be split over the course of two days by investigating each special right triangle separately

  • Pupils investigate relationships rather than being told what they are
  • Teacher resource includes suggested questions to use to guide class discussions

  • Includes very few examples and practice problems