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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:40AC GHM

Order: 19

Horizontal side: 40 Vertical side: 40

Elements: 2√2, 3, 4, 3√2, 5, 5√2, 6√2, 7√2, 10, 11, 8√2, 12, 13, 14, 11√2, 12√2, 18, 14√2, 20√2.

Code: 202 20 20 181 18 40 145 18 26 114 29 29 113 40 29 34 32 26 103 35 19 52 40 24 51 40 29 45 18 22 74 25 19 126 28 12 24 20 20 86 14 14 35 22 19 137 22 19 140 14 14 66 22 6 125 28 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)

20√2
18
14
11√2
11
3√2
10
5√2
5
4
7√2
12√2
2√2
8√2
3
13
14√2
6√2
12