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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:31AA4of4 GHM

Order: 19

Horizontal side: 31 Vertical side: 31

Elements: 1, 1√2, 2, 2√2, 4, 5, 4√2, 6, 7, 5√2, 8, 6√2, 10, 12, 13, 10√2, 12√2, 18, 13√2.

Code: 187 0 31 130 18 31 131 31 31 56 0 13 105 5 8 104 15 8 60 25 18 61 31 18 55 0 8 120 19 12 121 31 12 77 0 8 46 3 4 87 7 8 26 1 2 45 3 0 16 0 1 25 1 0 15 0 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)

18
13√2
13
5√2
10
10√2
6√2
6
5
12√2
12
7
4√2
8
2√2
4
1√2
2
1