Answer as many contraints as you are confident with, then go to the end and click on the submit button. You can also request the converse of the constraint - say no triangles present.

## Geometry search

### Does the pattern contain a regular polygon?

Number of sides of regular polygons - select all that apply: 3 : 4 : 5 : 6 : 7 : 8 : 12: other:

Absence of regular polygons - select all that apply: 3 : 4 : 5 : 6 : 7 : 8 : 12: other:

### Does the pattern contain a regular star-shaped polygon?

Number of points to stars: select all that apply: 3:   4:   5:   6:   7:   8:   9:   10:   12:   14:   16:   18:   20:   24: other:

No stars with these number of points: 3:   4:   5:   6:   7:   8:   9:   10:   12:   14:   16:   18:   20:   24: other:

You can specify the vertex angle for common cases:

8-pts and 90 degrees:   6-pts and 60 degrees:   8-pts and 45 degrees:   10-pts and 72 degrees:   12-pts and 60 degrees:

### Other properties

All angles of the pattern a multiple of:

45 degrees:   30 degrees:   90 degrees:   22.5 degrees:   36 degrees:   15 degrees:   60 degrees:

None of the above:

Contains diamonds:   Edge-to-edge:   8-matrix set:   Has kites:   Has darts:   Has Z-ring tiles:

No diamonds:   Not edge-to-edge:   No kites:   No darts:   8-matrix set:   Has Z-ring tiles:

Symmetry Group, the common cases:

p4m:   p6m:   cmm:   pmm:   p4g:   p4:

other:

Can be coloured with two colours:

Appears not to be coloured with two colours:

## Source search

Author (most used):

bonner:   bourgoin:   wichmann/wade:   paccard:   castera:   shafai:

Area:

Central Asia:   Egypt:   India:   Iran:   Morocco:   Spain:   Syria:   Turkey:

Central Asia:   Egypt:   India:   Iran:   Morocco:   Spain:   Syria:   Turkey:

Location:

Cairo:   Damascus:   Marrakesh:   Fez:   Samarkand: Meknes:   Isfahan:   Alhambra: Fatehpur Sikri:

Has photo (link):    Has photo (in documentation):

No photo (link):    No photo (in documentation):

If you cannot find a pattern you can email me (Brian Wichmann) with the details.

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