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Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:216AK GHM

Order: 18

Horizontal side: 216 Vertical side: 216

Elements: 11√2, 22, 16√2, 30, 22√2, 32, 34, 30√2, 44, 32√2, 48, 60, 45√2, 78, 108, 78√2, 138, 108√2.

Code: 1385 0 78 1084 108 108 1083 216 108 304 138 78 303 168 78 322 200 76 481 216 108 787 0 78 780 78 78 454 123 33 343 168 44 323 200 44 162 216 60 603 216 0 116 123 33 227 134 44 226 134 22 447 156 44

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)

138
108√2
108
30√2
30
32√2
48
78
78√2
45√2
34
32
16√2
60
11√2
22
22√2
44