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Concyclic points
Author:
Lamberto Lamberti
The figure shows a triangle ABC, if
A
,
D, E
,
G
are concyclic and
B
,
D,E
,
I
are concyclic, proof that
C
,
E
,
I,G
are concyclic.
http://www.gogeometry.com/school-college/p915-triangle-circle-cyclic-quadrilateral-concyclic.htm
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