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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:53AA GHM

Order: 18

Horizontal side: 53 Vertical side: 53

Elements: 2√2, 4, 4√2, 7, 8, 7√2, 11, 8√2, 9√2, 11√2, 16, 13√2, 15√2, 22, 16√2, 27, 31, 22√2.

Code: 317 0 53 220 31 53 221 53 53 90 9 31 164 25 15 163 41 15 82 49 23 81 49 31 42 53 27 41 53 31 273 53 0 112 11 11 111 11 22 77 11 22 70 18 22 22 13 13 154 26 0 130 13 13

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)

31
22√2
22
9√2
16√2
16
8√2
8
4√2
4
27
11√2
11
7
7√2
2√2
15√2
13√2