concyclic in tangential quadrilateral

ABCD are tangential quadrilateral. Prove that center of four circle (OAB), (OBC), (OCD), (ODA) lie on a circle
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Đào Thanh Oai —

 
Resource Type
Activity
Tags
circle  collinear  dao  incircle  midpoints  oai  perpendicular  quadrilateral  tangential  thanh  thebault triangle Show More…
Target Group (Age)
19+
Language
English (United Kingdom)
 
 
GeoGebra version
4.2
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1143
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