No. Polyhedrons are any shape with multiple sides. A triangle and a prism are just two different kinds of polyhedrons.
they are not sometimes prisms
Not true.
True. Some polyhedrons do not fit the definitions of prisms or pyramids. For example, a truncated tetrahedron is a polyhedron that has faces that are not all parallel and does not converge to a single point, which disqualifies it from being categorized as a prism or a pyramid.
Not all polyhedrons are prisms or pyramids. A polyhedron is defined as a three-dimensional shape with flat polygonal faces, straight edges, and vertices. While prisms have two parallel faces (bases) connected by rectangular lateral faces, and pyramids have a base and triangular faces that converge at a point, there are other types of polyhedrons, such as irregular polyhedra, that do not fit these definitions. Examples include shapes like the truncated tetrahedron or the dodecahedron, which do not qualify as either prisms or pyramids.
Yes, some polyhedrons are neither prisms nor pyramids. For example, a regular dodecahedron, which has twelve faces that are regular pentagons, does not fit the definitions of a prism (which has two parallel faces that are congruent polygons) or a pyramid (which has a single base and triangular faces meeting at a point). Other examples include the truncated tetrahedron and the icosahedron, which also do not conform to the characteristics of prisms or pyramids.
they are not sometimes prisms
Not true.
true
true
True. Some polyhedrons do not fit the definitions of prisms or pyramids. For example, a truncated tetrahedron is a polyhedron that has faces that are not all parallel and does not converge to a single point, which disqualifies it from being categorized as a prism or a pyramid.
Both pyramids and prisms are three dimensional. Both of them have polygon faces. Another thing common about pyramids and prisms is that they have a base and faces.
Not all polyhedrons are prisms or pyramids. A polyhedron is defined as a three-dimensional shape with flat polygonal faces, straight edges, and vertices. While prisms have two parallel faces (bases) connected by rectangular lateral faces, and pyramids have a base and triangular faces that converge at a point, there are other types of polyhedrons, such as irregular polyhedra, that do not fit these definitions. Examples include shapes like the truncated tetrahedron or the dodecahedron, which do not qualify as either prisms or pyramids.
Triangular prisms and square-based pyramids have 5 faces. Trapezoid prisms and cubes have 6 faces. Hexagonal prisms and octahedrons have 8 faces.
Yes, some polyhedrons are neither prisms nor pyramids. For example, a regular dodecahedron, which has twelve faces that are regular pentagons, does not fit the definitions of a prism (which has two parallel faces that are congruent polygons) or a pyramid (which has a single base and triangular faces meeting at a point). Other examples include the truncated tetrahedron and the icosahedron, which also do not conform to the characteristics of prisms or pyramids.
no not all pyramids are polyhedron because each pyramid has a different shape. so no each pyramid is not a polyhedron * * * * * Yes they are.
Prisms are a subset of polyhedra (or polyhedrons!)
Polyhedrons are three-dimensional shapes with flat faces, straight edges, and sharp corners, known as vertices. Examples of polyhedrons include cubes, pyramids, prisms, and dodecahedrons. These shapes have a closed surface and are made up of polygons, which are two-dimensional shapes with straight sides.