Saturday, May 8, 2010

Fox 276 - Solution

Solution to 276 was already known but figure below explains more. By Jim Wilson:
The locus of point P is the arc of a circle. Because the central angle must be twice the subtended arc in measure, the central angle is 60. Thus the major arc has length 10π/6. Since the trajectory would also be over a second arc that is a reflection in AB, the total trajectory is 10π/3.

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