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2. Six-dimensional space - Wikipedia

   en.wikipedia.org/wiki/Six-dimensional_space

   A polytope in six dimensions is called a 6-polytope. The most studied are the regular polytopes, of which there are only three in six dimensions: the 6-simplex, 6-cube, and 6-orthoplex. A wider family are the uniform 6-polytopes, constructed from fundamental symmetry domains of reflection, each domain defined by a Coxeter group.

3. Folding table - Wikipedia

   en.wikipedia.org/wiki/Folding_table

   Folding table of Rolls-Royce Phantom I Open Tourer Windovers (1926) A card table is a square table with legs that fold up individually, with one leg lining each edge. Card tables are traditionally used for playing card games, board games, and other tabletop games. Due to their low cost and small storage size, in the United States they are ...

4. Table (furniture) - Wikipedia

   en.wikipedia.org/wiki/Table_(furniture)

   Tables were made of marble or wood and metal (typically bronze or silver alloys), sometimes with richly ornate legs. Later, the larger rectangular tables were made of separate platforms and pillars. The Romans also introduced a large, semicircular table to Italy, the mensa lunata. Plutarch mentions use of "tables" by Persians. [6]

5. Section modulus - Wikipedia

   en.wikipedia.org/wiki/Section_modulus

   This is an indication of a section's capacity beyond the yield strength of material. The shape factor for a rectangular section is 1.5. [1] The table below shows formulas for the plastic section modulus for various shapes.

6. Basic dimension - Wikipedia

   en.wikipedia.org/wiki/Basic_dimension

   In a technical drawing, a basic dimension is a theoretically exact dimension, given from a datum to a feature of interest. In Geometric dimensioning and tolerancing, basic dimensions are defined as a numerical value used to describe the theoretically exact size, profile, orientation or location of a feature or datum target.

7. Four-dimensional space - Wikipedia

   en.wikipedia.org/wiki/Four-dimensional_space

   Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world. For example, the volume of a rectangular box is found by measuring and multiplying its length, width, and height (often labeled x, y, and z).