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

 

Đào Thanh Oai

 
Resource Type
Activity
Tags
circle  collinear  concurrent  four  nice  problem  seven  theorem  very 
Target Group (Age)
19+
Language
English (United States)
 
 
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4.4
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1150
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