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27 December, 21:21

Find the area of a sector with the given central angle α in a circle of radius r.

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  1. 27 December, 21:35
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    Area = [ (a) (pi•r^2) ]/360

    1. set up a proportion

    a/360 (# of ° in circle) = area of circle / (pi•r^2)

    2. cross multiply

    360area of circle = (a•pi•r^2)

    3. divide
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