A prolate spheroid is the name for shape of ball used in Rugby

1. The shape of the ball used in Rugby is called a "prolate spheroid." This shape is characterised by a polar radius (a) that is greater than equatorial radius (b).


2. An American Football can more accurately be describe by the term "vesica piscis." In Latin it literally means "fish bladder," and is a term for the shape formed by the intersection of two equal circles whose centers are offset by a distance equal to the circle radii.

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