Difference between revisions of "Excircle"
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| − | An '''excircle''' is a circle | + | An '''excircle''' is a [[circle]] [[tangent (geometry)|tangent]] to the extensions of two sides of a [[triangle]] and the third side. |
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| + | {{image}} | ||
== Properties == | == Properties == | ||
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==Related Formulas== | ==Related Formulas== | ||
| − | ==See | + | ==Problems== |
| + | ===Introductory=== | ||
| + | ===Intermediate=== | ||
| + | ===Olympiad=== | ||
| + | *[[1997 USAMO Problems/Problem 2]] | ||
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| + | ==See also== | ||
| + | *[[Incircle]] | ||
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| + | [[Category:Definition]] | ||
| + | [[Category:Geometry]] | ||
Revision as of 15:00, 2 November 2007
An excircle is a circle tangent to the extensions of two sides of a triangle and the third side.
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Contents
Properties
For any triangle, there are three unique excircles.
