Construction Citations
Circumscribed Circle: already known
Incenter: https://www.youtube.com/watch?v=9xnnwFd4LTE
Inscribed Circle: https://www.youtube.com/watch?v=YRJ4C7nRuUk
Orthocenter: https://www.youtube.com/watch?v=j5OpSewzGQU
Euler Segment:
http://lrrpublic.cli.det.nsw.edu.au/lrrSecure/Sites/LRRView/8884/documents/eulersegment.pdf
Pedal Triangle: https://en.wikipedia.org/wiki/Pedal_triangle
Medial Triangle: https://en.wikipedia.org/wiki/Medial_triangle
Orthic Triangle: http://mathworld.wolfram.com/OrthicTriangle.html
9 Point Circle:
http://jwilson.coe.uga.edu/emt668/emt668.folders.f97/anderson/geometry/geometry1project/construction/construction.html
Circle Flower: http://www.sacred-geometry.es/?q=en/content/flower-life