School level

Theorem 20

Added: 25 Mar 2020 Contributor: PDST Resource type: Demonstration / Simulation / Tool

(i) Each tangent is perpendicular to the radius that goes to the point of contact.
(ii) If P lies on the circle S, and a line l is perpendicular to the radius to P, then l is a tangent to S.

How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 1. Synthetic Geometry

Suggestions for use: Geogebra file to explore theorem 20: (i) Each tangent is perpendicular to the radius that goes to the point of contact. (ii) If P lies on the circle S, and a line l is perpendicular to the radius to P, then l is a tangent to S.

Meta information

  • Asset type: Online Resource
  • Language: English
  • Rights: Attribution-Noncommercial Creative Commons
  • Cost: No
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