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Describe the locus of points Z

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September 27, 2010
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Problem Statement

We are given a circle KK with center SS and radius 11 and a square QQ with center MM and side 22. Let XYXY be the hypotenuse of an isosceles right triangle XYZXY Z. Describe the locus of points ZZ as XX varies along KK and YY varies along the boundary of Q.Q.