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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:81AC GHM

Order: 18

Horizontal side: 81 Vertical side: 81

Elements: 8, 11, 10√2, 15, 11√2, 18, 20, 15√2, 22, 18√2, 26, 20√2, 30, 33, 26√2, 37, 40, 33√2.

Code: 377 0 81 260 37 81 261 63 81 187 63 81 186 63 63 85 63 55 116 0 44 225 11 33 401 51 55 202 71 35 201 71 55 102 81 45 303 81 15 115 0 33 337 0 33 330 33 33 154 66 0 153 81 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)

37
26√2
26
18
18√2
8
11√2
22
40
20√2
20
10√2
30
11
33
33√2
15√2
15