Cubic Command
From GeoGebra Manual
- Cubic[ <Point>, <Point>, <Point>, <Number> ]
- Gives n-th triangle cubic of the given triangle ABC.
- Example:Let A = (0, 1), B = (2, 1) and C = (1, 2).
Cubic[A, B, C, 2]
yields the implicit curve x³ - 3x² - 5x y² + 14x y - 7x + 5y² - 14y = -9.
Note: This command is in development, set of supported index n is changing.
Some common triangle cubics
Index n | Cubic |
---|---|
1 | Neuberg Cubic |
2 | Thomson Cubic |
3 | McCay Cubic |
4 | Darboux Cubic |
5 | Napoleon/Feuerbach Cubic |
7 | Lucas Cubic |
17 | 1st Brocard Cubic |
18 | 2nd Brocard Cubic |
Comments