Pentagonal diamond
The pentagonal diamond is a geometrical Figure belonging to the solid of Johnson ( J 13).
As its name suggests it, it can be obtained by uniting 2 pyramids pentagonal S ( J 2) by their bases, which in fact a convex Deltaèdre . Although all its faces are uniform, it is not a solid of Plato because some of its tops have four joint faces whereas others have five of them.
The 92 Solides of Johnson were named and described by Norman Johnson in 1966.
External bonds
- MathWorld.wolfram.com - Johnson Solid
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