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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:56AS2of4 GHM

Order: 19

Horizontal side: 56 Vertical side: 56

Elements: 1, 1√2, 2, 3, 4, 6, 5√2, 6√2, 7√2, 12, 14, 12√2, 18, 14√2, 21, 18√2, 21√2, 35, 38.

Code: 385 0 18 351 35 56 217 35 56 216 35 35 72 42 28 56 37 23 142 56 14 23 37 21 12 38 22 13 38 21 45 38 18 31 38 21 125 0 6 124 12 6 180 24 18 181 42 18 143 56 0 65 0 0 64 6 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)

38
35
21
21√2
7√2
5√2
14√2
2
1√2
1
4
3
12
12√2
18√2
18
14
6
6√2