Squaring.net >> IRTS >> PPIRTSS >> Order 19

Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:156BK1of4 GHM

Order: 19

Horizontal side: 156 Vertical side: 156

Elements: 4, 4√2, 8, 8√2, 12, 9√2, 18, 28, 20√2, 30, 40, 30√2, 39√2, 40√2, 60, 48√2, 78, 96, 78√2.

Code: 965 0 60 784 78 78 783 156 78 181 96 78 305 96 48 304 126 48 396 117 39 605 0 0 404 40 20 403 80 20 47 80 60 40 84 60 121 96 60 87 80 56 80 88 56 287 80 48 480 108 48 94 117 39 204 60 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)

96
78√2
78
18
30
30√2
39√2
60
40√2
40
4
4√2
12
8
8√2
28
48√2
9√2
20√2