Hello Milan,
this is a sphere of diameter 8 mm, so its radius is 8/2 = 4 mm.
The surface area of a sphere is S = 4πr2
therefore S = 4π(4)2 = 4π(16) = 64π mm2 = 201.06 mm2
Hello Milan,
this is a sphere of diameter 8 mm, so its radius is 8/2 = 4 mm.
The surface area of a sphere is S = 4πr2
therefore S = 4π(4)2 = 4π(16) = 64π mm2 = 201.06 mm2
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