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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:220AB GHM

Order: 18

Horizontal side: 220 Vertical side: 220

Elements: 20, 15√2, 26, 20√2, 40, 52, 54, 56, 40√2, 52√2, 54√2, 56√2, 82, 84, 69√2, 112, 82√2, 84√2.

Code: 842 84 136 694 69 151 546 84 166 827 138 220 826 138 138 156 69 151 545 84 112 265 138 112 843 84 52 405 84 72 404 124 72 1123 164 0 562 220 56 205 84 52 204 104 52 563 220 0 525 0 0 524 52 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)

84√2
69√2
54√2
82
82√2
15√2
54
26
84
40
40√2
112
56√2
20
20√2
56
52
52√2