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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:56AO GHM

Order: 19

Horizontal side: 56 Vertical side: 56

Elements: 1, 1√2, 2, 2√2, 3√2, 6, 7, 6√2, 7√2, 12, 14, 10√2, 12√2, 14√2, 21, 18√2, 21√2, 35, 28√2.

Code: 355 0 21 284 28 28 186 38 38 106 28 28 122 50 26 123 50 14 62 56 20 217 0 21 210 21 21 74 28 14 73 35 14 32 38 18 63 56 14 26 36 16 16 35 15 25 36 14 15 35 14 144 42 0 143 56 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)

35
28√2
18√2
10√2
12√2
12
6√2
21
21√2
7√2
7
3√2
6
2√2
1√2
2
1
14√2
14