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A circle has a sector with an area of 20 pi and a central angle of 2/5pi radians. What’s the area of the circle

 Mar 31, 2020
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(2/5)pi  radians  =  72°

 

So....the  area  of the  circle  must  be  5*20 pi  = 100 pi   since  360°  =  5 * 72°

 

 

cool cool cool

 Mar 31, 2020

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