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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:56AR GHM

Order: 19

Horizontal side: 56 Vertical side: 56

Elements: 1√2, 2, 2√2, 4, 4√2, 6, 5√2, 8, 6√2, 12, 14, 10√2, 12√2, 18, 14√2, 18√2, 28, 38, 28√2.

Code: 385 0 18 284 28 28 283 56 28 81 36 28 67 36 28 56 37 23 147 42 28 146 42 14 10 37 23 27 36 22 26 36 20 45 38 18 187 0 18 180 18 18 124 30 6 123 42 6 42 46 10 100 46 10 64 36 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)

38
28√2
28
8
6
5√2
14
14√2
1√2
2
2√2
4
18
18√2
12√2
12
4√2
10√2
6√2