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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:56AT4of4 GHM

Order: 19

Horizontal side: 56 Vertical side: 56

Elements: 1, 1√2, 2, 2√2, 3√2, 6, 7, 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 73 42 21 142 56 14 34 38 18 10 41 21 11 42 21 20 40 20 21 42 20 187 0 18 180 18 18 124 30 6 123 42 6 143 56 0 64 36 0 63 42 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
7
14√2
3√2
1√2
1
2√2
2
18
18√2
12√2
12
14
6√2
6