Special Right Triangle 30-60-90: Lesson

This Special Right Triangle 30-60-90: Lesson video also includes:

It is special—given one length, you can find the other two. A segment of a basic geometry playlist provides the ratio of the lengths of sides of a 30-60 right triangle. The presentation shows how to use the ratio to find side lengths given any one length.

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Instructional Ideas

  • Use an equilateral triangle with its altitude to prove the ratios are those given in the video
Classroom Considerations

  • Individuals should know how to simplify numerical expressions with radicals
  • Expects students understand the parts of a right triangle

  • Contains a link to other CK-12 30-60-90 resources
  • Includes worked examples

  • None