Triangle ABC, inscribed in a circle, has AB=15, BC= 25. A tangent to a circle is drawn through B and a line through A and is parallel to this tangent intersects BC at D. Find DC.
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Triangle ABC, inscribed in a circle, has AB=15, BC= 25. A tangent to a circle is drawn through B and a line through A and is parallel to this tangent intersects BC at D. Find DC.