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Problem 217: (2011 AMC 12b, 20)
Triangle $ABC$ has $AB = 13, BC = 14$, and $AC = 15$. The points $D, E$, and $F$ are the midpoints of $\overline{AB}, \overline{BC}$, and $\overline{AC}$ respectively. Let $X \not= E$ be the intersection of the circumcircles of $\Delta BDE$ and $\Delta CEF$. What is $XA + XB + XC$? $\textbf{(A)}\ 24 \qquad$ $ \textbf{(B)}\ 14\sqrt{3} \qquad$ $ \textbf{(C)}\ \frac{195}{8} \qquad$ $ \textbf{(D)}\ \frac{129\sqrt{7}}{14} \qquad$ $ \textbf{(E)}\ \frac{69\sqrt{2}}{4}$
Solution
Exercise 217: Solution
Triangle $ABC$ has $AB=9,BC=10,AC=17$. Points $D,E,F$ are midpoints of $\overline{AB},\overline{BC},\overline{AC}$. Let $X\ne E$ be the intersection of the circumcircles of $\triangle BDE,\triangle CEF$. What is $XA+XB+XC$?
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