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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:56AP JDS

Order: 19

Horizontal side: 56 Vertical side: 56

Elements: 1, 1√2, 2, 2√2, 3, 4, 3√2, 4√2, 6, 8, 10, 9√2, 18, 20, 18√2, 28, 20√2, 36, 28√2.

Code: 365 0 20 284 28 28 283 56 28 81 36 28 42 40 24 61 42 28 32 45 25 31 45 28 17 45 28 10 46 28 101 56 28 27 45 27 90 47 27 43 40 20 22 42 22 205 0 0 204 20 0 180 38 18 181 56 18

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)

36
28√2
28
8
4√2
6
3√2
3
1
1√2
10
2
9√2
4
2√2
20
20√2
18√2
18