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OpenStudy (anonymous):
if a door that is 36 inches in width opens to an angle of 140, what is the length of the arc created by the door
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OpenStudy (amistre64):
\[arc=\frac{\theta}{180}\pi~ r\]
OpenStudy (amistre64):
when theta = 360 that simplifies to the usual circumference: 2pi r
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