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Primitive Perfect Isosceles Right Triangled Square

Title: _d 19:178BH3of4 GHM

Order: 19

Horizontal side: 178 Vertical side: 178

Elements: 5√2, 10, 12, 10√2, 20, 15√2, 25, 19√2, 20√2, 25√2, 38, 32√2, 38√2, 57, 64, 57√2, 89, 121, 89√2.

Code: 1215 0 57 894 89 89 893 178 89 324 121 57 206 133 69 252 178 64 251 178 89 123 133 57 152 148 54 643 178 0 577 0 57 570 57 57 384 95 19 383 133 19 50 148 54 100 143 49 101 153 49 207 133 39 194 114 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)

121
89√2
89
32√2
20√2
25√2
25
12
15√2
64
57
57√2
38√2
38
5√2
10√2
10
20
19√2