Regular octahedron (Wikipedia)
A regular octahedron is an octahedron that is a regular polyhedron. All the faces of a regular octahedron are equilateral triangles of the same size, and exactly four triangles meet at each vertex. A regular octahedron is convex, meaning that for any two points within it, the line segment connecting them lies entirely within it.- North St. Paul, Minnesota (Wikipedia)
North Saint Paul (abbreviated North St. Paul) is a city in Ramsey County, Minnesota, United States, located east-northeast of the city of Saint Paul. The population was 12,364 at the 2020 census.