A spheroid is three dimensional shape which looks like a flattened sphere having circular symmetry. A spheroid is formed when an ellipse is rotated about one of its principal axis. An ellipse has two principal axes major axis and minor axis. When the ellipse is rotated about its major axis, the result is prolate which is elongated sphere, looks like a rugby ball and when the ellipse is rotated about its minor axis, the result is oblate spheroid which is flattened sphere and it looks like a Frisbee.
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