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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:57AA6of16 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: 275 0 30 184 18 39 183 36 39 217 36 57 216 36 36 94 27 30 93 36 30 65 36 30 147 0 30 146 0 16 287 14 30 303 42 0 152 57 15 82 8 8 153 57 0 83 8 0 42 12 4 43 12 0 22 14 2

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)

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