The figure below shows circles O and Q
intersecting at A and B and a line CDEF ( C and E on circle O, D
and F on circle Q). CA and BF meet at H, DA and BE meet at G. Prove that
A, B, H, and G are concyclic points.
![Problem 1085 about Intersecting Circles, Concyclic Points, Cyclic Quadrilateral Infographic Geometry problem 1085: Intersecting Circles, Concyclic Points, Cyclic Quadrilateral](p1085-intersecting-circles-concyclic-points-math.gif)
See also: Art of problem 1085 using iPad
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