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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:90AM GHM

Order: 18

Horizontal side: 90 Vertical side: 90

Elements: 4, 4√2, 8, 11, 12, 11√2, 12√2, 20, 22, 24, 31, 22√2, 24√2, 35, 44, 46, 35√2, 55.

Code: 555 0 35 441 44 90 222 66 68 461 90 90 223 66 46 242 90 44 114 55 35 113 66 35 243 90 20 357 0 35 350 35 35 311 66 35 125 66 8 124 78 8 203 90 0 47 66 8 46 66 4 87 70 8

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)

55
44
22√2
46
22
24√2
11√2
11
24
35
35√2
31
12
12√2
20
4
4√2
8