a net
2d, or two demensional
The shape of a flattened circle is called an ellipse. The shape is similar to an oval and some may mistakenly call it an oval.
A 12 sided 3D shape is called a dodecahedron.
The flattened shape of the Earth is called an "oblate spheroid." This means that the planet is slightly flattened at the poles and bulges at the equator due to its rotation. As a result, the Earth's diameter is larger at the equator than at the poles.
An 11-sided 3D shape is a hendecahedron.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
An oval 3D shape is called an ellipsoid. It is a three-dimensional shape that is similar to a stretched out sphere.
Trapezoid is 3D. The shadow of this shape is called Trapezium.
A 3D shape that has 6 edges is called a hexagonal prism.
it is a mushed 3d sphere
If by "flattened" you mean "like someone took a sphere and sat on it", that would be an oblate spheroid.
the name of a 20 sided 3d shape is called a icosahedron