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Problem 285: (2017 AMC 12B, 24)
Quadrilateral $ABCD$ has right angles at $B$ and $C$, $\triangle ABC \sim \triangle BCD$, and $AB > BC$. There is a point $E$ in the interior of $ABCD$ such that $\triangle ABC \sim \triangle CEB$ and the area of $\triangle AED$ is $17$ times the area of $\triangle CEB$. What is $\tfrac{AB}{BC}$? $\textbf{(A) } 1+\sqrt{2} \qquad$ $ \textbf{(B) } 2 + \sqrt{2} \qquad$ $ \textbf{(C) } \sqrt{17} \qquad$ $ \textbf{(D) } 2 + \sqrt{5} \qquad$ $ \textbf{(E) } 1 + 2\sqrt{3}$
Solution
Exercise 285: Solution
Quadrilateral $ABCD$ has right angles at $B$ and $C$, $\triangle ABC \sim \triangle BCD$, and $AB>BC$. There is a point $E$ in the interior of $ABCD$ such that $\triangle ABC\sim\triangle CEB$ and $[AED]=5[CEB]$. What is $\tfrac{AB}{BC}$?
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