Help with this problem.
When the marked angles added, it is 120 degrees.
Last edited by pajala; March 15th 2006 at 02:44 AM.
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Equilic Quadrilateral, nice!
AKMC is cyclic 'cause , then . In the other hand BMJC is also cyclic, therefore are collinear and analogous form L.
Try to prove the rest, is not hard.
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