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.

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.
Solution:
is a right angled triangle with sides AB and BC are 15 and 25 units
respectively. We can...