Excosine Circle

If the tangents at B and C to the circumcircle of a triangle DeltaABC intersect in a point K_1, then the circle with center K_1 and which passes through B and C is called the excosine circle, and cuts AB and AC in two points which are extremities of a diameter.

See also

Cosine Circle

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Lachlan, R. An Elementary Treatise on Modern Pure Geometry. London: Macmillian, p. 75, 1893.

Referenced on Wolfram|Alpha

Excosine Circle

Cite this as:

Weisstein, Eric W. "Excosine Circle." From MathWorld--A Wolfram Web Resource.

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