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08-01-2017
Mathematics

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

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kaevras kaevras

08-01-2017

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.

4π(3.017)² = 114.4 to 1DP

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