J92 - J1 - J2
Johnson solid (J1)
The Johnson square pyramid can be characterized by a single edge-length parameter a. The height H (from the midpoint of the square to the apex), the surface area A (including all five faces), and the volume V of such a pyramid are:
Other square pyramids
Other square pyramids have isosceles triangle sides.
For square pyramids in general, with base length l and height h, the surface area and volume are:
|A regular octahedron can be considered a square bipyramid, with two Johnson square pyramids connected base-to-base.||The tetrakis hexahedron can be considered a cube with short square pyramids added to each face.|
Like all pyramids, the square pyramid is self-dual, containing the same number of vertices and faces.
A square pyramid can be represented by the Wheel graph W5.
- Bipyramid - A bipyramid is two pyramids connected base to base.
- Weisstein, Eric W., "Square pyramid" from MathWorld.
- Square Pyramid—Interactive Polyhedron Model
- Virtual Reality Polyhedra www.georgehart.com: The Encyclopedia of Polyhedra (VRML model)
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