# Definitions for johnson solidjohn·son sol·id

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1. Johnson solid(Noun)

any of a class of convex polyhedra which is neither a Platonic solid, Archimedean solid, prism or antiprism

2. Origin: From Norman Johnson American mathematician

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1. Johnson solid

In geometry, a Johnson solid is a strictly convex polyhedron, each face of which is a regular polygon, but which is not uniform, i.e., not a Platonic solid, Archimedean solid, prism or antiprism. There is no requirement that each face must be the same polygon, or that the same polygons join around each vertex. An example of a Johnson solid is the square-based pyramid with equilateral sides; it has 1 square face and 4 triangular faces. As in any strictly convex solid, at least three faces meet at every vertex, and the total of their angles is less than 360 degrees. Since a regular polygon has angles at least 60 degrees, it follows that at most five faces meet at any vertex. The pentagonal pyramid is an example that actually has a degree-5 vertex. Although there is no obvious restriction that any given regular polygon cannot be a face of a Johnson solid, it turns out that the faces of Johnson solids always have 3, 4, 5, 6, 8, or 10 sides. In 1966, Norman Johnson published a list which included all 92 solids, and gave them their names and numbers. He did not prove that there were only 92, but he did conjecture that there were no others. Victor Zalgaller in 1969 proved that Johnson's list was complete.

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### Numerology

1. Chaldean Numerology

The numerical value of johnson solid in Chaldean Numerology is: 6

2. Pythagorean Numerology

The numerical value of johnson solid in Pythagorean Numerology is: 1

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