List K
Similitude Centers of Circles 2
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
  1. The Internal Center of Similitude of the Circumcircle wrt the Incentral Triangle and the Nine-Point Circle wrt the Incentral Triangle is the X(1962).
  2. The External Center of Similitude of the Circumcircle wrt the Incentral Triangle and the Nine-Point Circle wrt the Incentral Triangle is the X(500).
  3. The Internal Center of Similitude of the Circumcircle wrt the Incentral Triangle and the Second Brocard Circle wrt the Incentral Triangle is the X(8143).
  4. The Internal Center of Similitude of the Incircle wrt the Incentral Triangle and the Spieker Circle wrt the Incentral Triangle is the X(1962).
  5. The External Center of Similitude of the Incircle wrt the Incentral Triangle and the Inner Johnson-Yff Circle wrt the Incentral Triangle is the X(500).
  6. The External Center of Similitude of the Incircle wrt the Incentral Triangle and the Outer Johnson-Yff Circle wrt the Incentral Triangle is the X(500).
  7. The Internal Center of Similitude of the Nine-Point Circle wrt the Incentral Triangle and the Tangential Circle wrt the Incentral Triangle is the X(8143).
  8. The Internal Center of Similitude of the Antimedial Circle wrt the Incentral Triangle and the Circumcircle wrt the Incentral Triangle is the X(1962).
  9. The External Center of Similitude of the Antimedial Circle wrt the Incentral Triangle and the Nine-Point Circle wrt the Incentral Triangle is the X(1962).
  10. The External Center of Similitude of the Inner Johnson-Yff Circle wrt the Incentral Triangle and the Outer Johnson-Yff Circle wrt the Incentral Triangle is the X(500).