This is the revision history for ellipse in <matrix.org:#rAnyijhRxzFRfdjSHl:matrix.org>

factoid_idsubjectcopulapredicateauthornamespace
3419 ellipse is sqrt( (x + C)^2 + y^2) + sqrt( (x - C)^2 + y^2) - 2A = 0 perlbot <*:##NULL>