20 hexominoes (coloured black) have no symmetry. Their symmetry groups consist only of the identity mapping
6 hexominoes (coloured red) have an axis of mirror symmetry aligned with the gridlines. Their symmetry groups have two elements, the identity and an orthogonal reflection.
2 hexominoes (coloured green) have an axis of mirror symmetry at 45° to the gridlines. Their symmetry groups have two elements, the identity and a diagonal reflection.
5 hexominoes (coloured blue) have point symmetry, also known as rotational symmetry of order 2. Their symmetry groups have has two elements, the identity and a 180° rotation.
2 hexominoes (coloured purple) have two axes of mirror symmetry, both aligned with the gridlines. Their symmetry groups have four elements.
Generated and uploaded by AndrewKepert 01:02, 26 Nov 2003 (UTC)
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.
2005-08-29 03:57 Riumplus 337×433× (1317 bytes) Removed unused colours in the PNG palette, losslessly shrinking file size by 41%
2003-11-26 01:00 AndrewKepert 337×433× (2224 bytes) The 35 hexominos
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