Ортоцентр
Ортоцентр — виçкĕтеслĕхĕн çӳллĕшĕсем е вĕсен тăсăмĕсем хĕресленекен пăнчă.
.png)
Вуламалли
тӳрлет- Понарин Я. П. Элементарная геометрия. В 2 т. — М.: МЦНМО, 2004. — С. 37-39. — ISBN 5-94057-170-0.
- Nathan Altshiller-Court. College geometry : an introduction to the modern geometry of the triangle and the circle. — Dover Publications, Inc., 2007. — ISBN 0-486-45805-9.
- Ross Honsberger. Episodes in Nineteenth and Twentieth Century Euclidean Geometry. — Mathematical Association of America, 1995. — Vol. 37. — P. 17-26. — (New Mathematical Library). — ISBN 0-88385-639-5 (Vol. 37). — ISBN 0-88385-600-X (complete set).
- Weisstein, Eric W. "Orthocentric System." From MathWorld--A Wolfram Web Resource. [1]
Каçăсем
тӳрлет- Живой чертёж
- Bernard Gibert Circumcubic K006(ĕçлемен каçă)
- Clark Kimberling, "Encyclopedia of triangle centers". (Lists some 5000 interesting points associated with any triangle.)