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- 15:00, 16 February 2018 (diff | hist) . . (+269) . . N 2018 AMC 12B Problems/Problem 4 (Created page with "A circle has a chord of length 10, and the distance from the center of the circle to the chord is 5. What is the area of the circle? (A) <math>25\pi</math> (B) <math>50\...")