Instructional Video

Khan Academy: Proof: Radius Is Perpendicular to Tangent Line

Curated by ACT

Sal proves that the radius that connects the intersection point of a tangent line with the circle is perpendicular to the tangent line.

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CCSS: Adaptable
Classroom Considerations
  • Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
  • The intended use for this resource is Instructional
Common Core