23. Two circles intersect at A and B. The tangent to the first cirlce at A cuts the second circle at c and the tangent to the second circle at A cuts the first circle at D. Prove that Tri ABC and Tri DBA are similar.

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- Mar 2nd 2009, 06:50 PMAmanda92Circle Geometry
23. Two circles intersect at A and B. The tangent to the first cirlce at A cuts the second circle at c and the tangent to the second circle at A cuts the first circle at D. Prove that Tri ABC and Tri DBA are similar.

Any Help appreciated - Mar 3rd 2009, 07:32 AMred_dog
For the first circle:

For the second circle: