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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:78BC GHM

Order: 19

Horizontal side: 78 Vertical side: 78

Elements: 2√2, 3, 4, 3√2, 4√2, 6, 5√2, 6√2, 9, 8√2, 9√2, 20, 15√2, 20√2, 30, 25√2, 40, 30√2, 66.

Code: 667 0 78 80 66 78 64 72 72 46 74 74 26 72 72 45 74 70 403 58 30 202 78 50 201 78 70 256 53 25 156 3 15 307 18 30 300 48 30 54 53 25 36 0 12 65 3 9 35 0 9 97 0 9 90 9 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)

66
8√2
6√2
4√2
2√2
4
40
20√2
20
25√2
15√2
30
30√2
5√2
3√2
6
3
9
9√2