It's an Isoceles terahedron. Pheew! I too needed to know!
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A 12 sided 3D shape is called a dodecahedron.
An 11-sided 3D shape is a hendecahedron.
Trapezoid is 3D. The shadow of this shape is called Trapezium.
That 3D shape is called triangular pyramid.
a 3d oval is called an ovoid and it looks like a type of egg