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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:90BA4of4 GHM

Order: 19

Horizontal side: 90 Vertical side: 90

Elements: 1√2, 2, 2√2, 3√2, 6, 6√2, 10, 9√2, 18, 20, 18√2, 20√2, 30, 26√2, 27√2, 40, 30√2, 54, 60.

Code: 605 0 30 541 54 90 272 81 63 184 72 72 183 90 72 94 81 63 266 64 46 103 64 36 65 64 40 22 66 38 34 67 37 403 70 0 202 90 20 23 66 36 12 67 37 64 60 30 305 0 0 304 30 0 203 90 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)

60
54
27√2
18√2
18
9√2
26√2
10
6
2√2
3√2
40
20√2
2
1√2
6√2
30
30√2
20