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23 September, 23:25

The measure of a central angle YCZ is 80 degrees. What is the sum of the areas of the two shadded sectors?

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  1. 24 September, 02:10
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    I found the figure of this problem.

    Given:

    central angle = 80°

    radius = 9

    area of a circle = π r² = 3.14 * 9² = 254.34 sq. units

    shaded area: 80° x 2 = 160°

    254.34 * 160/360 = 113.04 square units.

    The sum of the areas of the two shaded sectors is 113.04 square units.
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