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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:57AA1of16 GHM

Order: 19

Horizontal side: 57 Vertical side: 57

Elements: 2√2, 4, 4√2, 6, 8, 9, 8√2, 9√2, 14, 15, 18, 14√2, 21, 15√2, 18√2, 27, 28, 21√2, 30.

Code: 215 0 36 214 21 36 150 42 57 151 57 57 63 27 36 285 27 14 301 57 42 182 18 18 271 27 36 183 18 0 92 27 9 145 27 0 144 41 0 20 55 14 40 53 12 41 57 12 93 27 0 80 49 8 81 57 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)

21
21√2
15√2
15
6
28
30
18√2
27
18
9√2
14
14√2
2√2
4√2
4
9
8√2
8