A Line Associated with an Excircle
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An excircle is a circle drawn outside a triangle that is tangent to the extensions of two of its sides and to the third side.
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Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA
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See problem 5 in Classical Theorems in Plane Geometry.
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"A Line Associated with an Excircle"
http://demonstrations.wolfram.com/ALineAssociatedWithAnExcircle/
Wolfram Demonstrations Project
Published: March 7 2011