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In the figure below, AB and AC are tangents to a circle O and ADE and AFG are secants. The chords DG and EF meet at H. Prove that B, H, and C are collinear points. See also: Artwork of problem 1189, Warp Speed, Hyperdrive, Art 1.

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Post or view a solution to the problem 1189 Last updated: Feb 20, 2016