Three incenter and a vectex lie on a circle

Let ABCD be a tangential quadrilateral , F lie on AD. I,G,H respectively are incenter of FAB, FBC, FCD then I,G,H,F lie on a circle

 

Đào Thanh Oai

 
Resource Type
Activity
Tags
circle  collinear  dao  midpoints  oai  perpendicular  quadrilateral  tangential  thanh  thebault  triangle Show More…
Target Group (Age)
19+
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
Views
1164
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