## Nine-Point Center

The center (or ) of the Nine-Point Circle. It has Triangle Center Function

and is the Midpoint of the line between the Circumcenter and Orthocenter . It lies on the Euler Line.

References

Carr, G. S. Formulas and Theorems in Pure Mathematics, 2nd ed. New York: Chelsea, p. 624, 1970.

Dixon, R. Mathographics. New York: Dover, pp. 57-58, 1991.

Kimberling, C. Central Points and Central Lines in the Plane of a Triangle.'' Math. Mag. 67, 163-187, 1994.

Kimberling, C. Nine-Point Center.'' http://cedar.evansville.edu/~ck6/tcenters/class/npcenter.html.