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Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:138AB GHM

Order: 18

Horizontal side: 138 Vertical side: 138

Elements: 1√2, 6, 6√2, 12, 9√2, 10√2, 11√2, 20, 22, 17√2, 20√2, 40, 49, 59, 69, 79, 59√2, 69√2.

Code: 795 0 59 694 69 69 693 138 69 104 79 59 90 89 69 491 138 69 10 80 60 121 92 60 62 98 54 61 98 60 405 98 20 597 0 59 590 59 59 221 81 59 112 92 48 176 81 37 204 118 0 203 138 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)

79
69√2
69
10√2
9√2
49
1√2
12
6√2
6
40
59
59√2
22
11√2
17√2
20√2
20