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OpenStudy (anonymous):
How do you find the measure of an arc?
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OpenStudy (campbell_st):
find the circumference of the circle and then mulliply by the angle subtended at the centre over 360 \[l = \frac{x}{360} \times 2\pi r\] x = the angle subtended. If you are working in radians the formula is \[l = r \theta\]
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