Let circle A be in the interior of circle B and tangent to it at point M. Let chord QR of circle B be tangent to circle A at point P. Prove that angles PMQ and PMR are equal.
1993 British Mathematical Olympiad,Round 1,Problem 4.
(In reply to
Is there an easier way? by DrBob)
>Construct MN perpendicular to the tangent at M  this passes >through the centre of both circles. Call the centre of A, O
Why call the certre of A, O? The center of A is A.
Where exactly is N? Is MN a diameter of circle A? If so that would make angle MPN = 90 but it would certainly not be true that angle NMR = angle NPR

Posted by Jer
on 20051214 14:28:39 