first of all its not trapiezeim it is trapezium, a trapezium whether 2d or 3d as it is a term it is called trapezium only.
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It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
rhomboidssscubny
a sphere
It is called an endacehedron.
A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.