30-60-90 Triangles

Half of an equilateral triangle is a special right triangle. A video instructor shows how to find the pattern of the side lengths for a 30-60-90 triangle. She then applies the relationship to different examples.

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CCSS: Adaptable
Instructional Ideas

  • Have learners record notes as they watch the video
  • Post the video for absent pupils or those needing extra instruction
Classroom Considerations

  • Content is a direct continuation of the previous lessons in the series
Pros

  • Spends time developing the pattern of sides lengths in the 30-60-90 triangle
Cons

  • Instructor talks very quickly through the lesson 
Common Core