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.
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.
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
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
it is a mushed 3d sphere