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Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:216CE4of4 GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 2, 2√2, 4, 4√2, 6, 6√2, 7√2, 14, 20, 17√2, 27√2, 54, 74, 54√2, 71√2, 74√2, 108, 142, 108√2.

Code: 1425 0 74 1084 108 108 1083 216 108 274 135 81 203 162 88 547 162 108 546 162 54 76 135 81 67 142 88 66 142 82 147 148 88 176 145 71 42 146 78 43 146 74 22 148 76 23 148 74 745 0 0 744 74 0 710 145 71

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)

142
108√2
108
27√2
20
54
54√2
7√2
6
6√2
14
17√2
4√2
4
2√2
2
74
74√2
71√2