A triangle and four circles theorem

Let ABC be a triangle, and any circle, construct three circle tangent two sides and tangent circle at A1,B1,C1. Prove that AA1,BB1,CC1 are concurrent
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Đào Thanh Oai —

 
Resource Type
Activity
Tags
circle  collinear  concurrent  four  nice  problem  seven  theorem  very 
Target Group (Age)
19+
Language
English (United States)
 
 
GeoGebra version
4.4
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1241
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