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What is the measure of the central angle of a circle with radius 30 centimeters that intercepts an 18π

centimeters arc?

 

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Guest Jun 5, 2018
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Circumference = pi * d = pi * 2 * r

 

Fraction of circumference =  18 pi  / (pi*2*r)    (is also fraction of 360 degrees)

 

Fraction of 360 degree circle   360 *  18 pi /(pi*2*r)

=108 degrees

Guest Jun 5, 2018

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