Collinear in Two circle

Let two circle (O1),(O2) and a point O on the plane. OK,OG are tangent of O to (O1), OM,ON are tangent of O to (O2). IP is common tangent of (O1),(O2). IK meet PN at C; IG meets PN at A, PM meets IG at P; IK meets MP at D. Prove that: - B,O,C are collinear - O,A,D are collinear

 

Đào Thanh Oai

 
Resource Type
Activity
Tags
circle  collinear  concurrent  geometry  new  problem  theorem 
Target Group (Age)
19+
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
Views
997
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