QA-4: List of perpendicular QA-Lines
In next list all QA-points are mentioned without prefix “QA-”.
When lines have more than 2 points, they are defined by the 2 points with lowest serial number.
It is remarkable that there are hardly point-to-point QA-lines perpendicular !
Apparently because all QA-points (except QA-P12) have been constructed without using perpendicular lines.
The only perpendicular settings in a Quadrangle are:
– QA-Cu7 (QA-Quasi Isogonal Cubic)-asymptote _|_ P1.P32 // P2.P4 // P7.P8 // P12.P24.
– QA-Co2 (QA-Orthogonal Hyperbola) has 2 perpendicular asymptotes.
– QA-Co4 (QA-DT-P3-P12 Orthogonal Hyperbola) has 2 perpendicular asymptotes.
– F1.F2 _|_ P4.P12 // P6.P36 // P13.P28,
where F1 and F2 are the foci of the 2 QA-Parabolas (QA-2Co1).
With special property that P4.P12 = 2 * P6.P36 = 4 * P13.P28.
When we are looking for perpendicular lines between QA-points and also include QG-points, then there are plenty of perpendicular lines. See QG-4.