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OpenStudy (anonymous):
What is the degree measure of an arc 4pi ft. long in a circle of radius 10 ft.?
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OpenStudy (anonymous):
4pi=(2pi10(x/360) blah blah blah x=72 degrees
OpenStudy (anonymous):
circumference of the circle=2pir=20pi 20pi constitutes 360deg arc=4pi 4pi arc constitutes xdeg xdeg=(360*4pi)/20pi=360/5=72degree
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