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.
cylinder
A polyhedron is a three-dimensional figure formed by flat surfaces that are bounded by polygons joining along their sides (the faces of the polyhedron).A circle is not a polygon, but we can say that a circle is the limit of a regular polygon with n sides. It means that if n becomes larger and larger, the polygon shape approaches to a circle. A circle is a two dimensional figure as a polygon is, but a three dimensional figure whose base(s) is/are a circle cannot be called a polyhedron.
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
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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.