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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:238AA GHM

Order: 18

Horizontal side: 238 Vertical side: 238

Elements: 1√2, 36, 28√2, 36√2, 56, 46√2, 74, 76, 77, 79, 56√2, 80, 82, 84, 77√2, 79√2, 80√2, 82√2.

Code: 825 0 156 824 82 156 460 164 238 741 238 238 360 118 192 361 154 192 562 210 136 561 210 192 282 238 164 843 238 80 775 0 79 774 77 79 763 154 80 10 78 80 804 158 0 803 238 0 797 0 79 790 79 79

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)

82
82√2
46√2
74
36√2
36
56√2
56
28√2
84
77
77√2
76
1√2
80√2
80
79
79√2