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Use the circle in the URL. Find the length s to the nearest tenth of a foot. http://mapleta.mivu.org/mapleta/web/Alg2aMm000/Public_Html/Algebra%202A%20Unit%20Test/unit%204/cp%204.6-4.7%20Q4.jpg
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consider the circumference of a circle as "s"; the angle swept out in radians of a full circle is 2pi (2pi) r = s; we can generalize this to any angle swept out in radians (a) r = s
7pi.5 ----- = 7pi 5
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