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8 December, 15:17

In circle O, the m angle D O G = 92° and the length ofarc D Gis 16. Calculate the length of the radius.

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  1. 8 December, 15:38
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    Relation between circumference, C and the radius, r

    C = 2π r

    r = C / 2π

    Relation betwee C, the angle and the arc

    C/360° = arc / angle

    C/360° = 16/92°

    C = (16*360) / 92 =

    Substitue:

    r = [ (16*360) / 92] / 2π = 9.96 units [the same unit of the arc DG]
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