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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:90AR GHM

Order: 19

Horizontal side: 90 Vertical side: 90

Elements: 2√2, 4, 4√2, 6√2, 12, 9√2, 11√2, 18, 20, 22, 24, 18√2, 22√2, 24√2, 27√2, 46, 33√2, 48, 54.

Code: 545 0 36 461 46 90 225 46 68 224 68 68 336 57 57 205 46 48 114 57 57 45 46 44 44 50 44 66 48 42 127 54 48 483 66 0 242 90 24 24 48 42 182 18 18 274 27 9 243 90 0 183 18 0 92 27 9

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)

54
46
22
22√2
33√2
20
11√2
4
4√2
6√2
12
48
24√2
2√2
18√2
27√2
24
18
9√2