Talk:Central line (geometry)

Notational definition needed
The definition section currently reads:


 * Let ABC be a plane triangle and let ( x : y : z ) be the trilinear coordinates of an arbitrary point in the plane of triangle ABC.


 * A straight line in the plane of triangle ABC whose equation in trilinear coordinates has the form
 * f ( a, b, c ) x + g ( a, b, c ) y + h ( a, b, c ) z = 0
 * where the point with trilinear coordinates ( f ( a, b, c ) : g ( a, b, c ) : h ( a, b, c ) ) is a triangle center,
 * is a central line in the plane of triangle ABC relative to the triangle ABC.

Are a, b, c the triangle's side lengths (as they would be in typical notation)? If so, this needs to be stated in the definition section (or if not, they still need to be defined). Thanks. Loraof (talk) 15:33, 3 July 2015 (UTC)

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