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・ Square root of a 2 by 2 matrix
・ Square root of a matrix
・ Square root of negative one
・ Square Roots
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・ Square scooter
・ Square Shells
・ Square Shootin' Square
・ Square sign
・ Square stitch
・ Square Tavern
・ Square the Circle
・ Square the Circle (Joan Armatrading album)
・ Square the Circle (Mami Kawada album)
・ Square thread form
Square tiling
・ Square tiling honeycomb
・ Square Toiletries
・ Square Tower
・ Square triangular number
・ Square trisection
・ Square United
・ Square watermelon
・ Square wave
・ Square wheel
・ Square Window
・ Square yard
・ Square Yards
・ Square – Brussels Meeting Centre
・ Square's Tom Sawyer


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Square tiling : ウィキペディア英語版
Square tiling

In geometry, the square tiling, square tessellation or square grid is a regular tiling of the Euclidean plane. It has Schläfli symbol of , meaning it has ''4'' squares around every vertex.
Conway calls it a quadrille.
The internal angle of the square is 90 degrees so four squares at a point make a full 360 degrees. It is one of three regular tilings of the plane. The other two are the triangular tiling and the hexagonal tiling.
== Uniform colorings ==
There are 9 distinct uniform colorings of a square tiling. Naming the colors by indices on the 4 squares around a vertex: 1111, 1112(i), 1112(ii), 1122, 1123(i), 1123(ii), 1212, 1213, 1234. (i) cases have simple reflection symmetry, and (ii) glide reflection symmetry. Three can be seen in the same symmetry domain as reduced colorings: 1112i from 1213, 1123i from 1234, and 1112ii reduced from 1123ii.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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