There is no such thing as a 3d triangle. A 3d shape which has only equilateral triangular faces can be a tetrahedron which has 4 faces or an icosahedron which has 20.
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
That 3D shape is called triangular pyramid.
it is a strong inadiquate word that describes a 3d shape. A tetrahedron.
A tetrahedron.
A triangular pyramid.
triangular pyramid
A regular tetrahedron (triangular pyramid).
A cube is one of them
a triangular pyramid
it is a 3D shape and has 4 sides
Cuboid