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Primitive Perfect Isosceles Right Triangled Square

Title: _d 19:78AR GHM

Order: 19

Horizontal side: 78 Vertical side: 78

Elements: 1, 1√2, 4, 4√2, 5√2, 8, 10, 11, 8√2, 9√2, 18, 21, 16√2, 18√2, 30, 39, 30√2, 48, 39√2.

Code: 485 0 30 394 39 39 393 78 39 94 48 30 103 57 29 52 62 34 211 78 39 160 62 34 307 0 30 300 30 30 84 38 22 83 46 22 15 46 29 14 47 29 117 46 29 44 42 18 43 46 18 184 60 0 183 78 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)

48
39√2
39
9√2
10
5√2
21
16√2
30
30√2
8√2
8
1
1√2
11
4√2
4
18√2
18