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MathNet 2008-part-05 — 164 problems (EN–VI) Question 115

Math Olympiad Vault · MathNet 2008-part-05 — 164 problems (EN–VI)

Question 115

Let $ABC$ be an equilateral triangle with side length $2$, and let $\Gamma$ be a circle with radius $\frac{1}{2}$ centered at the center of the equilateral triangle. Determine the length of the shortest path that starts somewhere on $\Gamma$, visits all three sides of $ABC$, and ends somewhere on $\Gamma$ (not necessarily at the starting point). Express your answer in the form of $\sqrt{p}-q$, where $p$ and $q$ are rational numbers written as reduced fractions.