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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:80AJ2of2 GHM

Order: 19

Horizontal side: 80 Vertical side: 80

Elements: 4, 4√2, 7, 8, 8√2, 12, 9√2, 14, 18, 14√2, 20, 18√2, 19√2, 28, 20√2, 31, 40, 33√2, 40√2.

Code: 405 0 40 404 40 40 336 47 47 73 47 40 192 66 28 202 20 20 121 12 40 47 12 40 40 16 40 311 47 40 87 12 36 86 12 28 182 38 18 283 66 0 142 80 14 203 20 0 183 38 0 92 47 9 143 80 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)

40
40√2
33√2
7
19√2
20√2
12
4
4√2
31
8
8√2
18√2
28
14√2
20
18
9√2
14