A polyhedron of which one face is a square, and the other faces are triangles with a common vertex.
yes it is a polyhedron
no a cuboid is not a polyhedron if it was it would have 9 faces
It is not a regular polyhedron because it has unequal sides
There are different formulae for different polyhedra and these depend on what information about the polyhedron is given.
The definition of polyhedron. If it was not faceted it would not be a polyhedron.
A polyhedron, be definition, must be 3-dimensional. Therefore, there can be no such thing as a 2-d polyhedron
Yes, by definition.
It is so by definition.
No. By definition a polyhedron has to have faces (flat surfaces), edges, and vertices. A sphere, hemisphere, and a cylinder are all solids but are not polyhedra.
If you mean polyhedron - it is solid figure having many faces
A diagonal is a line joining two nonconsecutive vertices of a polygon or polyhedron.
a 3d object made of 2d faces with all flat sides
A polyhedron of which one face is a square, and the other faces are triangles with a common vertex.
A nonahedron is a nine faced polyhedron. A nonahedron is also known as a enneahedron. There are 2606 distinct convex nonahedra.
No, they are the faces of the polyhedron.
Start with the definition of a polygon. A polygon is a 2-dimensional (flat) surface all of whose boundaries are straight lines. Then, a polyhedron is a 3-dimensional (solid) object all of whose faces are polygons.