- Woodland Park (Seattle) (Wikipedia)
Woodland Park is a 90.9-acre (36.8 ha) public park in Seattle’s Phinney Ridge and Green Lake neighborhoods that originated as the estate of Guy C. Phinney, lumber mill owner and real estate developer. Phinney died in 1893, and in 1902, the Olmsted Brothers firm of Boston was hired to design the city’s parks, including Woodland Park.
- Regular tetrahedron (Wikipedia)
A regular tetrahedron is a tetrahedron in which all four faces are equilateral triangles. In other words, all of its faces are the same size and shape (congruent) and all edges are the same length. A convex polyhedron in which all of its faces are equilateral triangles is the deltahedron. There are eight convex deltahedra, one of which is the regular tetrahedron.
