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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:72AD GHM

Order: 18

Horizontal side: 72 Vertical side: 72

Elements: 4√2, 6, 8, 6√2, 8√2, 12, 14, 11√2, 16, 14√2, 20, 22, 16√2, 20√2, 22√2, 25√2, 30√2, 36√2.

Code: 362 36 36 304 30 42 40 60 72 121 72 72 206 36 48 87 56 68 80 64 68 162 72 44 161 72 60 66 30 42 205 36 28 226 50 22 116 25 25 147 36 28 146 36 14 67 50 28 250 25 25 225 50 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)

36√2
30√2
4√2
12
20√2
8
8√2
16√2
16
6√2
20
22√2
11√2
14
14√2
6
25√2
22