Conic Section: 3 Points, 2 Tangents
- Author:
- Ryan Hirst
- Topic:
- Conic Sections
Case: Three points and two tangents are given.
NOTES:
The points of tangency D, E are found using Involution (projection).
I then know five points, a case I can solve (http://www.geogebratube.org/material/show/id/213219).
When the solution exists, there are four choices. Drag D to any of the red diamonds.
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Construction of the orange diamonds (double points of an involution): http://www.geogebratube.org/material/show/id/243899