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Incircle, Excircles, and the 9-Point Circle
Author:
Steve Phelps
Topic:
Circle
,
Circumcircle or Circumscribed Circle
,
Incircle or Inscribed Circle
,
Triangles
There are four circles tangent to three sides of a triangle...
GeoGebra
And one circle tangent to all four circles.
GeoGebra
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