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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:216BJ GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 2, 2√2, 4, 6, 8, 10, 10√2, 20, 15√2, 30, 39, 39√2, 69, 78, 69√2, 108, 78√2, 138, 108√2.

Code: 1385 0 78 1084 108 108 1083 216 108 301 138 108 205 138 88 394 177 69 393 216 69 105 138 78 104 148 78 26 156 86 45 158 84 83 156 78 25 156 84 67 156 84 150 162 84 785 0 0 784 78 0 690 147 69 691 216 69

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)

138
108√2
108
30
20
39√2
39
10
10√2
2√2
4
8
2
6
15√2
78
78√2
69√2
69