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

 
Material Type
Activity
Tags
theorem  circle  problem  seven  very  nice  concurrent  four  collinear 
Target Group (Age)
19+
Language
English (United States)
 
 
GeoGebra version
4.4
Views
1132
Report a problem
 
 
© 2018 International GeoGebra Institute