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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:81AA GHM

Order: 18

Horizontal side: 81 Vertical side: 81

Elements: 3√2, 7√2, 8√2, 16, 19, 15√2, 22, 16√2, 24, 25, 19√2, 28, 30, 32, 25√2, 38, 28√2, 31√2.

Code: 312 31 50 284 28 53 283 56 53 252 81 56 251 81 81 323 81 24 34 31 50 150 34 53 221 56 53 196 0 19 385 19 0 301 49 38 72 56 31 165 49 8 164 65 8 243 81 0 195 0 0 84 57 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)

31√2
28√2
28
25√2
25
32
3√2
15√2
22
19√2
38
30
7√2
16
16√2
24
19
8√2