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AMC 10 2021a Problem 21

  • Paper

Let ABCDEFABCDEF be an equiangular hexagon. The lines AB,CD,AB, CD, and EFEF determine a triangle with area 1923192\sqrt{3}, and the lines BC,DE,BC, DE, and FAFA determine a triangle with area 3243324\sqrt{3}. The perimeter of hexagon ABCDEFABCDEF can be expressed as m+npm +n\sqrt{p}, where m,n,m, n, and pp are positive integers and pp is not divisible by the square of any prime. What is m+n+pm + n + p? (A) 47(B) 52(C) 55(D) 58(E) 63\textbf{(A)} ~47 \textbf{(B)} ~52 \textbf{(C)} ~55 \textbf{(D)} ~58 \textbf{(E)} ~63

Dataset text NuminaMath-1.5. Quoted with source.

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55

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