# ConjugateDiameter Command

From GeoGebra Manual

Revision as of 11:12, 24 August 2015 by Markus.winkler (talk | contribs)

- ConjugateDiameter[ <Line>, <Conic> ]
- Returns the conjugate diameter of the diameter that is parallel to the given line (relative to the conic section).
**Example:**`ConjugateDiameter[-4x + 5y = -2, x^2 + 4 y^2 + 2x - 8y + 1 = 0]`

yields line 5*x*+ 16*y*= 11

- ConjugateDiameter[ <Vector>, <Conic> ]
- Returns the conjugate diameter of the diameter that is parallel to the given vector (relative to the conic section).
**Example:**Let*u*= (4,1) be a vector. Then`ConjugateDiameter[u, x^2 + 4 y^2 + 2x - 8y + 1 = 0]`

yields line*x*+*y*= 0