In geometry, a ball used in rugby is...
a torus
a hyperball
an elliptic cylinder
an ellipsoid
An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation. A rugby ball is an example of ellipsoid.
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a torus
a hyperball
an elliptic cylinder
an ellipsoid
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