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17 May, 06:57

Find the area of a sector with a central angle of 170° and a diameter of 9.1 cm. Round to the nearest tenth.

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  1. 17 May, 07:52
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    A central angle:

    α = 170°

    d = 9.1 cm

    r = 9.1 : 2 = 4.55 cm

    Area of a sector:

    A = r² π α / 360°

    A = (4.55) ² · 3.14 · 170° / 360°

    A = 30.7 cm²
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