Editing Worldpedia:Today's featured list/March 14, 2025

{{TFLcontent
|image=Square pyramid.png
|size=<!-- Optional. Use to override standard sizes. Not needed in most cases. -->
|title=Equilateral square pyramid
|alt=Rendering of an equilateral square pyramid
|blurb = In geometry, '''[[List of Johnson solids|there are 92 Johnson solids]]''', which are [[Polyhedron|convex polyhedra]] in which all [[Face (geometry)|faces]] are [[regular polygon]]s. The definition of a [[Johnson solid]], according to some authors, excludes [[Uniform polyhedron|uniform polyhedra]] (which include [[Platonic solid]]s, [[Archimedean solid]]s, [[Prism (geometry)|prism]]s and [[antiprism]]s). They are named after the American mathematician [[Norman Johnson (mathematician)|Norman Johnson]], who published a list of 92 non-uniform Johnson polyhedra in 1966; his list begins with the [[Square pyramid|equilateral square pyramid]] ''(pictured)'', an example of a [[Composite polyhedron#Definition and examples|elementary polyhedron]]. His conjecture that the list was complete and no other examples of Johnson solids existed was proven by the Russian-Israeli mathematician [[Victor Zalgaller]] in 1969.
|link=List of Johnson solids
|recentlist=
* [[List of protected cruisers of France|Protected cruisers of France]]
* [[List of Olympic women's ice hockey players for the United States|Olympic women's ice hockey players for the United States]]
* [[77th Academy Awards]]
}}