How on earth do i do this circle geometry problem?!? - Math Help Forum

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$Old$ May 22nd, 2009, 06:06 PM

xwrathbringerx $xwrathbringerx is offline$

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$Exclamation$ How on earth do i do this circle geometry problem?!?

Two circles intersect at A and B. The tangent to the 1st circle at A cuts the 2nd circle at C and the tangent to the 2nd circle at A cuts the 1st circle at D. Prove that triangles ABC and DBA are similar.

Last edited by xwrathbringerx; May 22nd, 2009 at 07:21 PM.

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$Old$ May 22nd, 2009, 08:26 PM

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Hi!
It is a simple application of Alternate Segment theorem.
read it here:Alternate Segment Theorem

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