Analysis of all egg shapes used four geometric figures: sphere, ellipsoid, ovoid, and pyriform (conical or pear-shaped), with a mathematical formula for the pyriform yet to be derived.

Analysis of all egg shapes used four geometric figures: sphere, ellipsoid, ovoid, and pyriform (conical), with a mathematical formula for the pyriform yet to be derived.

Symplectic geometry is more complicated. Here, the answer depends on the ellipsoid’s “eccentricity,” a number that represents how elongated it is. A long, thin shape with a high eccentricity can be ...

Bizarre geometric shapes that appear at the centre of swirling vortices in planetary atmospheres ... as the bucket's spin sped up, from an ellipse to a three-sided star, to a square, a pentagon ...

The unique shape of the football, for example, contributes the dynamic nature of the ball itself, which can be thrown long distances in a tight spiral or bounce unpredictably on the field of play.