QG-L5: 2nd QG-Quasi Euler line

The 2^nd QG-Quasi Euler line is the line through QG-P8 (2^nd Quasi Centroid), QG-P9 (2^nd Quasi Circumcenter), QG-P10 (2^nd Quasi Orthocenter) and QG-P11 (2^nd Quasi Nine-point Center).

Coefficients of QG-L5

The coefficients of QG-L5 can be easily derived by calculating the Crossdifference (see [13] crossdifference) of QG-P8 and QG-P9.

Properties

• QG-L5 is the Euler line of the 2^nd QG-Quasi Diagonal Triangle QG-Tr2.
• The 2^nd QG-Quasi Euler line QG-L4 // the 1^st QG-Quasi Euler line QG-L5.
• QG-P1 is the Railway Watcher (see QL-L-1) by the 1st QG-Quasi Euler line QG-L4 and the 2nd QG-Quasi Euler line QG-L5 (note Eckart Schmidt).

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