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# How many edges does a square-based pyramid have?

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A square based pyramid has eight edges. It has four edges on its square base and four edges along the four triangles that make up its sides.

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Credit: Kris Runstrom CC-BY 2.0

A square based pyramid is a pentahedron, meaning it has five faces. It consists of four equilateral triangles, which have equal sides and equal angles. This shape is a regular polygon, which by definition has a regular polygon as its base and equally sized triangles as its faces. An irregular polygon has an irregular polygon as its base and faces of different sizes.

Other types of pyramids include a triangular pyramid, pentagonal pyramid and hexagonal pyramid, all of which are named for the shape of their bases. A right pyramid has sides that are isosceles triangles, which have two equal sides and angles. An oblique pyramid has at least one side that is not an isosceles triangle.

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## Related Questions

• A:

A square-based pyramid has five corners, which are typically called vertices. It consists of a square base, which has four corners, as well as a corner at the apex where the triangle faces converge.

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A square-based pyramid has five vertices. The vertices are the corner points formed by the intersection of three edges. For a square-based pyramid, there are four vertices at the bottom, and one at the apex.

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Find the volume of a square pyramid by using the formula (1/3) x A^2 x h, where A is the measurement of one side of the square base and h is the height. You need to know the values of the base and the height of the pyramid.