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16 December, 13:28

Find the area of a sector with central angel 3pi/2 in a circle with radius 5?

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  1. 16 December, 13:51
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    Find area of circle

    A=pir^2

    A=pi5^2

    A=25pi

    then find how much the central angle is

    whole circle is 2pi radians

    (3pi/2) / 2pi=3pi/4pi=3/4

    it is 3/4 of whole area

    area=25pi units^2

    3/4 times 25pi=75/4pi units^2=

    18 and 3/4 pi square units=

    18.75ip square units
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