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Geometry Level 3

E \text{E} is the midpoint of line segment CD \text{CD} of quadrilateral ABCD \text{ABCD} such that CDA ^ = DAB ^ = 9 0 \widehat{\text{CDA}} = \widehat{\text{DAB}} = 90^\circ and BE BC = 17 5 \displaystyle \frac{\text{BE}}{\text{BC}} = \frac{\sqrt{17}}{5} . If BCD ^ = 2 EAD ^ \widehat{\text{BCD}} = 2\widehat{\text{EAD}} then what is the value of CD AB \displaystyle \frac{\text{CD}}{\text{AB}} ?

4 2 3 2\sqrt{3} 13 \sqrt{13} 3 2 3\sqrt{2} 15 \sqrt{15} 17 \sqrt{17} 19 \sqrt{19} 14 \sqrt{14}

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