A sphere is a three dimensional ball, appearing like a circle, which is an object in two dimensional space. Radius of the sphere is nothing but the distance from the exact center to any point covering the outer edge of the sphere. It is abbreviated as 'R' or 'r'. Radius is important in finding the circumference, surface area, and/or volume of sphere. Use our geometric radius of a sphere calculator to calculate the sphere radius based on real numbers

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