The shape of an egg.
It's an ovoid, not an ellipsoid as some may think.
Egg
A hexahedron is the name for a 6 sided 3D shape.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
the name of a 20 sided 3d shape is called a icosahedron
a 3d oval is called an ovoid and it looks like a type of egg
Oh, dude, you mean like an oval-shaped egg but in 3D? That would be an "ellipsoid." It's like the fancy mathematical term for a squished egg shape. So, next time you're trying to impress your friends with your knowledge of 3D egg shapes, just drop the word "ellipsoid" and watch their minds be blown.
A cube is a 3D shape with a top and bottom.
Ellipsoid, Ovoid, Prolate Spheroid, Spheroid
In science, a three-dimensional oval is called an ovoid. Less formally, a three-dimensional oval shape is called an egg.
A solid.