Encyclopedia > Excircle

  Article Content


In geometry an excircle or escribed circle of a triangle is a circle lying outside the triangle, tangent to one of its sides and tangent to the extensions of the other two sides.

Every triangle has three distinct excircles, each tangent to the side of the triangle it is associated with. The center of an excircle lies on the internal bisector of one angle and the external bisectors of the other two.

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Bartholomeus de Glanvilla

... 1988, hardcover, 338 pages, ISBN 0198185308 pp. 401-435 A History of Magic and Experimental Science: During the First Thirteen Centuries of Our Era, Volume II, Lynn ...