Jumat, 27 Agustus 2010

5th Asian Pacific Mathematics Olympiad 1993 Problems

5th Asian Pacific Mathematics Olympiad 1993 ProblemsA1.  A, B, C is a triangle. X, Y, Z lie on the sides BC, CA, AB respectively, so that AYZ and XYZ are equilateral. BY and CZ meet at K. Prove that YZ2 = YK.YB. A2.

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