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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:136AR GHM

Order: 18

Horizontal side: 136 Vertical side: 136

Elements: 2, 2√2, 4, 4√2, 7, 8, 7√2, 8√2, 15√2, 23, 30, 30√2, 46, 60, 46√2, 53√2, 90, 68√2.

Code: 905 0 46 684 68 68 536 83 83 156 68 68 235 83 60 77 83 60 76 83 53 85 90 52 84 98 52 603 106 0 302 136 30 45 90 48 44 94 48 25 90 46 24 92 46 465 0 0 464 46 0 303 136 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)

90
68√2
53√2
15√2
23
7
7√2
8
8√2
60
30√2
4
4√2
2
2√2
46
46√2
30