Hemisphere Calculator
A sphere is a perfectly round 3D object where every point on the surface is equidistant from the center. It encloses the maximum volume for a given surface area — a property used by bubbles and cells.
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Fun Fact
A sphere is the only shape where the surface area in square units equals the volume in cubic units when r = 3 (SA = 4π·9 = 36π, V = (4/3)π·27 = 36π).
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