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Primitive Perfect Isosceles Right Triangled Square

Title: __ 19:216CF GHM

Order: 19

Horizontal side: 216 Vertical side: 216

Elements: 1√2, 2, 2√2, 3√2, 4√2, 7√2, 10, 10√2, 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 81 105 142 78 104 152 78 176 145 71 22 144 76 21 144 78 12 145 77 44 148 74 30 145 77 745 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
10
10√2
17√2
2√2
2
1√2
4√2
3√2
74
74√2
71√2