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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:138AA GHM

Order: 18

Horizontal side: 138 Vertical side: 138

Elements: 9√2, 16, 18, 16√2, 18√2, 26, 22√2, 32, 26√2, 27√2, 30√2, 32√2, 52, 54, 60, 48√2, 54√2, 60√2.

Code: 605 0 78 604 60 78 96 111 129 187 120 138 186 120 120 270 111 129 540 84 102 541 138 102 525 0 26 304 30 48 224 52 26 480 74 48 324 106 16 323 138 16 265 0 0 264 26 0 164 122 0 163 138 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)

60
60√2
9√2
18
18√2
27√2
54√2
54
52
30√2
22√2
48√2
32√2
32
26
26√2
16√2
16