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2. Edge-matching puzzle - Wikipedia

   en.wikipedia.org/wiki/Edge-matching_puzzle

   An edge-matching puzzle is a type of tiling puzzle involving tiling an area with (typically regular) polygons whose edges are distinguished with colours or patterns, in such a way that the edges of adjacent tiles match. Edge-matching puzzles are known to be NP-complete, and adaptable for conversion to and from equivalent jigsaw puzzles and ...

3. Bullnose - Wikipedia

   en.wikipedia.org/wiki/Bullnose

   Bullnose trim is used to provide a smooth, rounded edge for countertops, staircase steps, building corners, verandas, or other construction.Masonry units such as bricks, concrete masonry units or structural glazed facing tiles may be ordered from manufacturers with square or bullnosed corners.

4. Euclidean tilings by convex regular polygons - Wikipedia

   en.wikipedia.org/wiki/Euclidean_tilings_by...

   Such tilings can be considered edge-to-edge as nonregular polygons with adjacent colinear edges. There are seven families of isogonal figures, each family having a real-valued parameter determining the overlap between sides of adjacent tiles or the ratio between the edge lengths of different tiles. Two of the families are generated from shifted ...

5. Terrazzo - Wikipedia

   en.wikipedia.org/wiki/Terrazzo

   Today, most of the terrazzo installed is epoxy terrazzo. The advantages of this material over cementitious terrazzo include a wider selection of colors, 1 ⁄ 4 to 3 ⁄ 8 inch (6.4 to 9.5 mm) installation thickness, lighter weight, faster installation, impermeable finish, higher strength, and less susceptibility to cracking. The disadvantage ...

6. Vinyl composition tile - Wikipedia

   en.wikipedia.org/wiki/Vinyl_composition_tile

   Vinyl floor tiling. Vinyl composition tile (VCT) is a finished flooring material used primarily in commercial and institutional applications. Modern vinyl floor tiles and sheet flooring and versions of those products sold since the early 1980s are composed of colored polyvinyl chloride (PVC) chips formed into solid sheets of varying thicknesses (1 ⁄ 8 in or 3.2 mm is most common) by heat and ...

7. Marble - Wikipedia

   en.wikipedia.org/wiki/Marble

   CaCO 3 (s) + MgSiF 6 (l) + 2HCl (l) → MgCl 2 (s) + CaSiF 6 (s) + CO 2 (g) + H 2 O(l) The resulting calcium hexafluorosilicate (CaSiF 6) is bonded to the surface of the marble. This is harder, more glossy and stain resistant compared to the original surface. The other often used method of finishing marble is to polish with oxalic acid (H 2 C 2 ...