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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:81AF GHM

Order: 19

Horizontal side: 81 Vertical side: 81

Elements: 4√2, 6, 8, 6√2, 8√2, 12, 16, 12√2, 20, 21, 23, 20√2, 21√2, 30, 31, 40, 42, 30√2, 45.

Code: 457 0 81 86 37 73 167 45 81 200 61 81 201 81 81 313 37 42 85 37 65 235 37 42 44 41 61 401 81 61 66 0 36 127 6 42 120 18 42 421 60 42 212 81 21 65 0 30 307 0 30 300 30 30 213 81 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)

45
8√2
16
20√2
20
31
8
23
4√2
40
6√2
12
12√2
42
21√2
6
30
30√2
21