Because that is how a polyhedron is defined.
Because that is how a polyhedron is defined.
A polyhedron.
It is so by definition.
Sphere
cube
312
A triangle is not a polyhedron. A triangle is a two-dimensional figure, and a polyhedron is a three-dimensional solid. An example of a triangular-shaped polyhedron is a pyramid.
No. A polygon is a 2-dimensional figure. A polyhedron is 3-dimensional.
A cuboid and a pyramid for examples.
It is a sphere which looks like a globe
A polyhedron.