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

Primitive Perfect Isosceles Right Triangled Square

Title: _r 19:80BM2of12 GHM

Order: 19

Horizontal side: 80 Vertical side: 80

Elements: 4, 4√2, 8, 7√2, 10, 8√2, 12, 14, 12√2, 18, 14√2, 20, 18√2, 28, 20√2, 21√2, 40, 52, 40√2.

Code: 525 0 28 404 40 40 403 80 40 121 52 40 47 52 40 40 56 40 124 68 28 206 60 20 87 52 36 186 42 18 82 68 28 142 14 14 214 21 7 283 42 0 107 42 28 205 60 0 185 42 0 143 14 0 72 21 7

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)

52
40√2
40
12
4
4√2
12√2
20√2
8
18√2
8√2
14√2
21√2
28
10
20
18
14
7√2