2008 AMC 10A Problem 19


Rectangle PQRSPQRS lies in a plane with PQ=RS=2PQ=RS=2 and QR=SP=6QR=SP=6. The rectangle is rotated 9090^\circ clockwise about RR, then rotated 9090^\circ clockwise about the point SS moved to after the first rotation. What is the length of the path traveled by point PP?

(A) (23+5)π(B) 6π(C) (3+10)π(D) (3+25)π(E) 210π\mathrm{(A)}\ \left(2\sqrt{3}+\sqrt{5}\right)\pi\qquad\mathrm{(B)}\ 6\pi\qquad\mathrm{(C)}\ \left(3+\sqrt{10}\right)\pi\qquad\mathrm{(D)}\ \left(\sqrt{3}+2\sqrt{5}\right)\pi\qquad\mathrm{(E)}\ 2\sqrt{10}\pi

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Category: AMC 10A
Points: 3
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