QL-4: List of perpendicular QL-Lines

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In next list all QL-points are mentioned without prefix “QL-”.

All lines relating to QL-P1 till QL-P26 have been taken into account.

When lines have more than 2 points, they are defined by the 2 points with lowest serial number.

These QL-lines are perpendicular:

–        P1.P7   _|_  P18.P23

–        P1.P8   _|_  P16.P24

–        P1.P25 _|_  P16.P17

–        P2.P3   _|_  P2.P7

–        P2.P7   _|_  P5.P7

–        P2.P10 _|_  P18.P23

–        P6.P9   _|_  P13.P17

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