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No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
The faces in a 3-D shape (polyhedron, for example) are bordered by edges.
it is a strong inadiquate word that describes a 3d shape. A tetrahedron.
A tridekahedron is a 3D 30 sided shape.
It is called a decahedron.
It is called an endacehedron.
A 3D 5 sided shape is called a dodecahedron. It is a solid with 20 vertices, 30 edges and 12 equal pentagonal triangular faces.
pentacontahedron
A decahedron.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
well. it is called icosahedron
That 3D shape is called triangular pyramid.
It is called a Triacontakaidigon.
CUBOID
A tetrahedron, also called a pyramid is a three-dimensional shape with four faces.
An irregular polyhedron if it has plane faces. If not, then there usually will not be a name for it.