Math

I think this will be the last one.

Find the radius of circle C if the measure of anglePQR=24° and the length of arc PR is 8pi.

Answers:
a.15 b.20 c.30 d.60 e.45

The diagram looks like a circle with its center at C. At a point on the edge of the circle is Q with lines reaching out to P and R at 24°. The arc between them is 8pi. Hope that helps

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  1. 24 degrees = 24 * pi/180 = pi*(2/15) radians

    (arc length)/radius = pi*(2/15)
    radius = (8 pi)/[(2/15)*pi]
    = 60

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    posted by drwls

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