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In the figure below, the rectangle at the corner measures $10\;\text{cm} \times 20\;\text{cm}.$ The corner A also the rectangle is also a point on the circumference of the circle. What is the radius of the circle in cm?

  1. $10\;\text{cm}$
  2. $40\;\text{cm}$
  3. $50\;\text{cm}$
  4. None of these
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go_editor asked Feb 8, 2016
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