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The curved parts of the figure are arcs centered at points A and C. What is the approximate length of boundary ABCD? Use the value = 3.14, and round the answer to one decimal place. A geometrical diagram of an arc circle and points A, B, C, and D are marked, angle 120 degrees marked at ABC, angle 30 degrees marked at ACD. 5 labeled on AB and DC lines. A. 17.8 B. 23.8 C. 23.1 D. 28.1

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