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It depends on the information you have.

You could put the sphere on a flat surface and lower a horizontal plane onto it so that it just touches the top of the sphere. The distance between the flat surface and the horizontal plane is the sphere's diameter; the radius is half that.

Or you could measure its volume by measuring the amount of fluid (water) that it displaces in a measuring container or the overflow from any full container. Then use the formula V = 4/3*pi*R3 to work out the radius.

If you knew the density of the material of the sphere, you could measure its mass and work out its volume that way.

Q: How you find the radius of a sphere?

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The radius of a sphere is 1/2 of its height.

Treat the 3D sphere as a 2D circle. The radius for the sphere is the same radius as for the circle. No matter where on the sphere you place a mark, the distance (radius) from the mark to the centre of the sphere will always be the same as the circle.

The surface area of the sphere with the radius doubled is 200 units2.---> Confirmed

It's the extension of the sphere's radius drawn to that point.

360 units cubed

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bidyogammes

The radius of a sphere is 1/2 of its height.

The radius of the sphere is ~16.395 units.

If the radius is 7 and the volume is 1232 the shape cannot be a sphere so you cannot find the height of a sphere when the shape is not a sphere!

Treat the 3D sphere as a 2D circle. The radius for the sphere is the same radius as for the circle. No matter where on the sphere you place a mark, the distance (radius) from the mark to the centre of the sphere will always be the same as the circle.

You have to cut the sphere in half and then measure across.

The formula for the volume of a sphere is based on the radius of the sphere. It is equal to 4/3 multiplied by pi, multiplied by the radius cubed.

you measuresit by the radius

A sphere with a volume of 50 units3 has a radius of 2.29 units. A sphere with twice the radius (4.58 units) has a volume of 402 units3.

The "area of a sphere" does not make sense. You must mean the "volume of a sphere". double radius = ...; double volume = 4. / 3. * 3.141592653589793 * radius * radius * radius;

The surface area of the sphere with the radius doubled is 200 units2.---> Confirmed

Use the formula for volume to solve for the radius of the sphere and then plug that radius into the formula for the surface area of a sphere.