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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:40AA GHM

Order: 19

Horizontal side: 40 Vertical side: 40

Elements: 1, 2, 2√2, 4, 3√2, 4√2, 6, 7, 6√2, 7√2, 8√2, 12, 14, 16, 12√2, 18, 13√2, 14√2, 20√2.

Code: 202 20 20 144 14 26 66 22 34 127 28 40 126 28 28 86 14 26 185 22 16 20 20 20 40 18 18 41 22 18 27 22 16 30 24 16 161 40 16 143 14 0 72 21 7 71 21 14 17 21 14 67 21 13 130 27 13

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)

20√2
14√2
6√2
12
12√2
8√2
18
2√2
4√2
4
2
3√2
16
14
7√2
7
1
6
13√2