it's a semi-sphere
circle is to semi-circle
as
sphere is to semi-sphere
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You have to cut the sphere in half and then measure across.
2000π/3
Volume of sphere = 4/3*pi*r3 So volume of half a sphere = 2/3*pi*r3= 2/3*pi*103 = 2000*pi/3 = 2094.4 cubic units
You need to follow these steps:1) Divide the diameter by 2, to get the radius. 2) Use this radius in the standard formula for the volume of a sphere. 3) Divide this result by 2, to get half a sphere.
A radius is half of the diameter of a circle or a sphere. Scroll down to related links and look at "Diameter - Wikipedia" or "Radius - Wikipedia"