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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:52AB GHM

Order: 19

Horizontal side: 52 Vertical side: 52

Elements: 1√2, 6, 7, 5√2, 6√2, 7√2, 10, 11, 12, 14, 10√2, 12√2, 17, 21, 15√2, 16√2, 17√2, 21√2, 30.

Code: 215 0 31 214 21 31 56 37 47 107 42 52 106 42 42 303 37 17 152 52 32 166 36 16 77 0 31 76 0 24 147 7 31 122 12 12 111 18 17 177 18 17 170 35 17 14 36 16 123 12 0 62 18 6 63 18 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)

21
21√2
5√2
10
10√2
30
15√2
16√2
7
7√2
14
12√2
11
17
17√2
1√2
12
6√2
6