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OpenStudy (anonymous):
trig multiple choice! a student contructs an arc length of a circle by rotating a radius of 10cm through an angle of 120º. the length of the arc subtended by the angle is approx a)21cm b)1200cm c) 10cm d)210cm
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OpenStudy (anonymous):
well u know the circumference of the circle is the radius times 2 times pi which in this case is 20pi. and 120 degrees is 1/3 of the full circle which means the arc length is 1/3 of 20pi in cm so plug it into the calculator but i assume it is answer a
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