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Author: Annie Fetter
Description: Geometry, difficulty level 3. AOD is a diameter of the circle with center O. B is any point on the circle that isn't A or D. A tangent is drawn to the circle at point B. A line is drawn through O parallel to AB, meeting the tangent at P. Prove that PD is a tangent to the circle.

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Problem page: /library/go.html?destination=3423
Support page: Online Resource Page #3423
Solution page: Problem #3423

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