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Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:142BD GHM

Order: 18

Horizontal side: 142 Vertical side: 142

Elements: 2√2, 4, 4√2, 8, 12, 14√2, 17√2, 20√2, 31, 23√2, 34, 40, 34√2, 51, 71, 51√2, 91, 71√2.

Code: 915 0 51 714 71 71 713 142 71 204 91 51 46 107 67 85 111 63 311 142 71 26 105 65 45 107 63 140 105 65 121 119 63 232 142 40 517 0 51 510 51 51 344 85 17 343 119 17 403 142 0 174 102 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)

91
71√2
71
20√2
4√2
8
31
2√2
4
14√2
12
23√2
51
51√2
34√2
34
40
17√2