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15 June, 18:26

Find the surface area Sphere: area of the great circle ~ 28.6 in2

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  1. 15 June, 18:29
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    Area of a circle is πr².

    Therefore we can get the radius of the great circle (and thus the sphere) by doing √ (A / π).

    √ (28.6 / π) = 3.017 to 3DP.

    Surface area of a sphere is 4πr².

    4 π (3.017) ² = 114.4 to 1DP
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