Ellipse Command

From GeoGebra Manual
Revision as of 17:17, 13 June 2013 by Mathmum (talk | contribs) (typo)
Jump to: navigation, search



Ellipse[ <Focus>, <Focus>, <Semimajor Axis Length> ]
Creates an ellipse with two focal points and semimajor axis length.
Example: Ellipse[(0, 1), (1, 1), 1] yields 12x² + 16y² - 12x - 32y = -7.
Note: Condition: 2*semimajor axis length > Distance between the focus points
Ellipse[ <Focus>, <Focus>, <Segment> ]
Creates an ellipse with two focal points, where the length of the semimajor axis equals the length of the given segment.
Example: Let s = Segment[(0,1), (2,1)] : Ellipse[(0, 1), (2, 1), s] yields 3x² + 4y² - 6x - 8y = 5.
Ellipse[ <Focus>, <Focus>, <Point> ]
Creates an ellipse with two focal points passing through a given point.
Example: Ellipse[(0, 1), (2, 1), (1,2)] yields 1x² + 2y² - 2x - 4y = -1.
Note: See also Tool Ellipse.gif Ellipse tool .
© 2020 International GeoGebra Institute