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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:222AA GHM

Order: 18

Horizontal side: 222 Vertical side: 222

Elements: 6√2, 12, 12√2, 24, 23√2, 24√2, 42, 46, 42√2, 44√2, 46√2, 88, 90, 92, 67√2, 86√2, 88√2, 90√2.

Code: 902 90 132 674 67 155 446 90 178 887 134 222 886 134 134 236 67 155 862 176 92 903 90 42 923 176 0 462 222 46 463 222 0 427 0 42 420 42 42 244 66 18 243 90 18 124 78 6 123 90 6 64 84 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√2
67√2
44√2
88
88√2
23√2
86√2
90
92
46√2
46
42
42√2
24√2
24
12√2
12
6√2