List K Similitude Centers of Circles 1 Points available in the Kimberling's Encyclopedia ETC. The ETC version: The 11186 points version of 2016. The "Discoverer" database version: October 2013. Last update: 2017-01-24- The Internal Center of Similitude of the Incentral Circle and the Nine-Point Circle wrt the Incentral Triangle is the X(1962).
- The External Center of Similitude of the Incentral Circle and the Nine-Point Circle wrt the Incentral Triangle is the X(500).
- The
Internal Center of Similitude of the Incentral Circle and the Second
Brocard Circle wrt the Incentral Triangle is the X(8143).
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