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A 14-sided and 3-dimensional shape is called either a tetrakaidecahedron or tetradecahedron. This 14-sided polyhedron can have six quadrilateral and eight hexagonal faces.
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A 12 sided 3D shape is a dodecahedron.
A tridekahedron is a 3D 30 sided shape.
heptadecadon
tetrahedron
Octadecadron