director circle (Q5280532)
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curve consisting of all points where two perpendicular tangent lines to the ellipse or hyperbola cross each other
- Fermat-Apollonius circle
- orthoptic circle
Language | Label | Description | Also known as |
---|---|---|---|
English | director circle |
curve consisting of all points where two perpendicular tangent lines to the ellipse or hyperbola cross each other |
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Wikipedia(2 entries)
- enwiki Director circle
- jawiki 準円