Instructional Video

Khan Academy: Geometry: 30 60 90 Triangle Side Ratios Proof

Curated by ACT

In this video tutorial [6:59], the instructor provides a proof for the relationship among the legs and hypotenuse of 30-60-90 triangles by breaking an equilateral triangle into two congruent triangles and using the Pythagorean threorem.

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Additional Tags
30-60-90 triangle, informal proof, proof of 30-60-90 triangle side ratios, khan academy, khan academy math, special right triangle
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Classroom Considerations
  • Knovation Readability Score: 1 (1 low difficulty, 5 high difficulty)