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Primitive Perfect Isosceles Right Triangled Square

Title: dr 19:78AI3of4 GHM

Order: 19

Horizontal side: 78 Vertical side: 78

Elements: 2, 2√2, 4, 3√2, 6, 8, 6√2, 7√2, 8√2, 14, 16, 16√2, 23, 24, 31, 39, 31√2, 47, 39√2.

Code: 475 0 31 394 39 39 393 78 39 84 47 31 83 55 31 162 71 23 231 78 39 317 0 31 310 31 31 241 55 31 70 71 23 66 58 10 147 64 16 163 78 0 36 55 7 65 58 4 41 62 4 22 64 2 21 64 4

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)

47
39√2
39
8√2
8
16√2
23
31
31√2
24
7√2
6√2
14
16
3√2
6
4
2√2
2