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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:80AX GHM

Order: 18

Horizontal side: 80 Vertical side: 80

Elements: 1, 1√2, 3, 4, 4√2, 7, 9, 11, 9√2, 11√2, 20, 20√2, 29, 31, 40, 29√2, 51, 40√2.

Code: 515 0 29 404 40 40 403 80 40 114 51 29 46 58 36 95 62 31 94 71 31 206 60 20 73 58 29 45 58 32 37 58 32 10 61 32 11 62 32 313 60 0 117 60 31 295 0 0 294 29 0 205 60 0

The properties below may precede order:side in a tiling's title:

Credit for Discovery

Just three people are credited with the discovery of Primitive Perfects:

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)

William T. Tutte (WTT, Canada, 1917-2002) (15:44AI, 17:136AJ and 19:56AJ only)

51
40√2
40
11√2
4√2
9
9√2
20√2
7
4
3
1√2
1
31
11
29
29√2
20