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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:84AF3of4 GHM

Order: 19

Horizontal side: 84 Vertical side: 84

Elements: 2√2, 4, 4√2, 8, 9, 8√2, 14, 18, 14√2, 21, 15√2, 18√2, 28, 21√2, 30, 36, 42, 33√2, 42√2.

Code: 425 0 42 424 42 42 336 51 51 93 51 42 152 66 36 285 0 14 301 30 42 212 51 21 211 51 42 363 66 0 182 84 18 183 84 0 145 0 0 144 14 0 20 28 14 40 26 12 41 30 12 80 22 8 81 30 8

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)

42
42√2
33√2
9
15√2
28
30
21√2
21
36
18√2
18
14
14√2
2√2
4√2
4
8√2
8