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3 October, 08:45

In a circle a 180 degree sector has a area 98 pie in square. What is the radius of the circle?

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  1. 3 October, 10:20
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    Sector area = central angle / 360 * PI * radius^2

    98 PI = (1 / 2) * PI * radius^2

    radius^2 = 196

    radius = 14
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