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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:61AI GHM

Order: 18

Horizontal side: 61 Vertical side: 61

Elements: 4, 4√2, 6, 8, 6√2, 9, 10, 11, 8√2, 10√2, 11√2, 16, 20, 22, 20√2, 29, 22√2, 51.

Code: 517 0 61 100 51 61 101 61 61 293 41 22 207 41 51 206 41 31 95 41 22 86 4 14 167 12 22 220 28 22 221 50 22 112 61 11 46 0 10 85 4 6 113 61 0 45 0 6 65 0 0 64 6 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
10√2
10
29
20
20√2
9
8√2
16
22√2
22
11√2
4√2
8
11
4
6
6√2