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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:131AA GHM

Order: 18

Horizontal side: 131 Vertical side: 131

Elements: 4√2, 8, 8√2, 14, 12√2, 14√2, 16√2, 28, 21√2, 28√2, 40, 42, 47, 56, 42√2, 47√2, 70, 89.

Code: 897 0 131 280 89 131 281 117 131 142 131 117 141 131 131 703 131 47 403 61 63 567 61 103 210 21 63 164 37 47 46 49 59 87 53 63 86 53 55 120 49 59 474 84 0 473 131 0 427 0 42 420 42 42

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)

89
28√2
28
14√2
14
70
40
56
21√2
16√2
4√2
8
8√2
12√2
47√2
47
42
42√2