QA-L9: Perpendicular Bisector of QA-P2.QA-P4

QA-L9 is the Perpendicular Bisector of line segment QA-P2.QA-P4.

This line is briefly mentioned in [34], EQF #135.

1^st CT-Coefficient of QA-L9:

c² p q (p + r) (q + r) – (p + q) r (a² q (p + r) – b² p (q + r))

1st CT-coordinate Infinity point QA-L9:

2 p (q + r) (c² p q – b² p r – b² q r + c² q r)

1^st DT-Coefficient of QA-L9:

a² / p²

1st DT-coordinate Infinity point QA-L9:

p² (c q – b r) (c q + b r)

Properties

• QA-L9 passes through QA-P6.
• QA-L9 _|_ QA-P1.QA-P32 // QA-P2.QA-P4 // QA-P7.QA-P8 // QA-P12.QA-P24
• QA-L9 // asymptote of QA-Cu7
• QA-L9 is the perpendicular bisector of line segment QA-P2.QA-P4.
• QA-L9 is the QA-Tf2 image of QA-Ci1.
• QA-L9 is the Pascal Line of the Hexagon formed by the points s12, s14, s13, s34, s23, s24 as described at QA-P38 (Seiichi Kirikami, January 8, 2013).
• QA-L9 is the polar of QA-P38 wrt QA-Ci1 (Eckart Schmidt, January 9, 2013)
• QA-Tf1(QA-L9) lies on QA-Cu1.

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