Q: What is the definition of pyramid?

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A triangular pyramid is apyramid whose base is a triangle.

A triangular pyramid is a pyramid with a triangular base; all pyramids are by definition three-dimensional figures, so a triangular pyramid is indeed 3D.

A pyramid is a 3 dimensional object with a polygonal base (with n sides) and n triangular faces meeting at an apex above the base.

A pyramid, being three-dimensional, does not have linesof symmetry.Your question should really be "How many planes of symmetry does a pyramid have?"This answer may vary, depending on your definition of symmetry. But normally the answer "Four" is accepted.

One, though it's technically a square - hence why it is called a square pyramid. By definition, a square pyramid has one square face. It also has four triangular faces which meet at the apex (the tip) of the pyramid.

Related questions

No. By definition, the lateral faces of a pyramid are triangular.No. By definition, the lateral faces of a pyramid are triangular.No. By definition, the lateral faces of a pyramid are triangular.No. By definition, the lateral faces of a pyramid are triangular.

A four sided pyramid with a square base.

A pyramid, by definition, has one base.

balls

A triangular pyramid is apyramid whose base is a triangle.

It is a small pyramid built beside the Pharaoh's pyramid where the queen is laid to rest when she passes.

A regular pyramid is a right pyramid whose base is a regular polygon. There are only three regular pyramids: a regular tetrahedron, a regular square pyramid, and a regular pentagonal pyramid.

A triangular pyramid is a pyramid with a triangular base; all pyramids are by definition three-dimensional figures, so a triangular pyramid is indeed 3D.

Energy pyramids are caca faces

I think the definition of social pyramid is all of the jobs that the people of Egypt have leading to the highest class which is the pharaoh

well i don't actually know O_O XD

A square pyramid has five faces, one of which is a square and the remaining four are triangles. Conventionally such a pyramid is called a square BASED pyramid and in that context it has only one base. [That definition is used to distinguish it from a pentagonal pyramid, a hexagonal pyramid, etc.] However, any one of the five faces can be at the bottom.