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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:216BL GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 4, 4√2, 8, 12, 9√2, 16, 18, 20, 20√2, 40, 30√2, 48, 60, 78, 69√2, 108, 78√2, 138, 108√2.

Code: 1385 0 78 1084 108 108 1083 216 108 304 138 78 123 168 96 85 168 100 481 216 108 45 168 96 44 172 96 206 156 80 405 176 60 183 156 78 167 156 96 205 156 60 785 0 0 784 78 0 96 147 69 690 147 69 601 216 60

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√2
12
8
48
4
4√2
20√2
40
18
16
20
78
78√2
9√2
69√2
60