File:Tangent from exterior point to circle construction.svg
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Summary
| Description | Using Thales' theorem to onstruct tangent lines from an exterior point P to a circle C with centre O by CMG Lee. After finding the midpoint M of OP (magenta), the intersections T₁ and T₂ of C with a circle of radius OM centred on M (cyan) give the tangent lines (tan). | |
| Source | Own work | |
| Author | Cmglee | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:12, 5 March 2025 | | 512 × 768 (4 KB) | Cmglee | Add alternative method |
| 13:03, 3 March 2025 |  | 512 × 384 (2 KB) | Cmglee | {{Information |Description=Using Thales' theorem to onstruct tangent lines from an exterior point ''P'' to a circle ''C'' with centre ''O'' by CMG Lee. After finding the midpoint ''M'' of ''OP'' (magenta), the intersections ''T''₁ and ''T''₂ of ''C'' with a circle of radius ''OM'' centred on ''M'' (cyan) give the tangent lines (tan). |Source={{own}} |Date= |Author= Cmglee |Permission= |other_versions= }} Category:Thales' theorem Category:Power of a point |
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