Problem 666: Intersecting Circles, Secant, Tangent, Concyclic points, Mind Map

Online Geometry Problems

The figure shows the intersecting circles O and O' at A and B and the secant CAD. CE and DE are tangent to circles O and O' at C and D, respectively. Prove that the points B,C,E,D are concyclic.

  

Intersecting circles, tangent, concyclic
  

 

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