Bitangent
Sign in to saveright|frame|The Trott curve (black) has 28 real bitangents (red). This image shows 7 of them; the others are symmetric with respect to 90° rotations through the origin and reflections through the two blue axes.
Wikidata facts
- Subclass of
- tangent
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- algebraic geometry
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Encyclopedic overview
4 sectionsContents
- Bitangents of algebraic curves
- Bitangents of polygons
- Related concepts
- References
right|frame|The Trott curve (black) has 28 real bitangents (red). This image shows 7 of them; the others are symmetric with respect to 90° rotations through the origin and reflections through the two blue axes.
In geometry, a bitangent to a curve is a line that touches in two distinct points and and that has the same direction as at these points. That is, is a tangent line at and at .
Excerpted from Wikipedia’s “Bitangent” article, available under the CC BY-SA 4.0 licence.