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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:56AA GHM

Order: 18

Horizontal side: 56 Vertical side: 56

Elements: 3, 4√2, 8, 7√2, 12, 9√2, 10√2, 15, 11√2, 16, 12√2, 18, 20, 16√2, 18√2, 20√2, 30, 22√2.

Code: 222 22 34 184 18 38 106 26 46 207 36 56 206 36 36 83 26 38 305 26 16 44 22 34 116 15 27 153 15 12 185 15 9 74 33 9 160 40 16 161 56 16 127 0 12 120 12 12 31 15 12 94 24 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√2
18√2
10√2
20
20√2
8
30
4√2
11√2
15
18
7√2
16√2
16
12
12√2
3
9√2