'excircle' can also refer to...


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An excircle of a triangle is a circle that lies outside the triangle and touches the three sides, two of them extended. There are three excircles. The centre of an excircle is an excentre of the triangle. Each excentre is the point of intersection of the bisector of the interior angle at one vertex and the bisectors of the exterior angles at the other two vertices.

Subjects: Mathematics.

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