3d shape Well actually it is a Cube
A 3D shape with all triangular faces can be a tetrahedron pyramid.
There are several of these. For example, dice.See related link below for more shapes
a sphere
According to Euler none; for all 3d shapes: Vertices + Faces = Edges + 2 ⇒ 12 + 8 = 19 + 2 ⇒ 20 = 21 So unless 20 does equal 21, no 3d shape has 8 faces, 19 edges and 12 vertices. Any 3d shape with 8 faces would be an octahedron.
3d shape Well actually it is a Cube
A 3D shape with all triangular faces can be a tetrahedron pyramid.
a triangular prism easy
A prism.
Octagon. * * * * * An octagon is 2-dimensional. The regular 3-d shape (all faces the same) is the octahedron, but a hexagonal prism also has 8 faces.
There are several of these. For example, dice.See related link below for more shapes
The 3d shape that have five faces would be a triangular prism **************** or a pyramid
A cube satisfies that description.
CUBOID
A 3d shape with 5 faces can be a square pyramid
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
A Pyramid is a 7 lettered 3D shape with triangular faces.