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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:56AI GHM

Order: 18

Horizontal side: 56 Vertical side: 56

Elements: 2√2, 7, 6√2, 7√2, 12, 14, 12√2, 17, 18, 14√2, 20, 21, 15√2, 22, 23, 17√2, 18√2, 21√2.

Code: 227 0 56 150 22 56 174 39 39 173 56 39 70 7 41 71 14 41 237 14 41 20 37 41 210 35 39 211 56 39 147 0 34 146 0 20 205 0 0 125 14 6 124 26 6 180 38 18 181 56 18 64 20 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)

22
15√2
17√2
17
7√2
7
23
2√2
21√2
21
14
14√2
20
12
12√2
18√2
18
6√2