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An arc of length 3.98 cm lies on a circle with circumference 12.57 cm. Calculate the radius of the circle and the size of the corresponding center angle.
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Note: This problem has dynamic elements. This means elements such as numbers and consequently the step-by-step solution and the final answer may change overtime. Therefore, there may be a difference between a problem that is published online and the same problem exported into a PDF document.
The circle radius measures:
The angle at the centre is:
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