Squaring.net >> IRTS >> PPIRTSS >> Order 18

Primitive Perfect Isosceles Right Triangled Square

Title: _d 18:142BF GHM

Order: 18

Horizontal side: 142 Vertical side: 142

Elements: 4√2, 12, 9√2, 12√2, 18, 16√2, 24, 18√2, 20√2, 31, 24√2, 40, 31√2, 51, 71, 51√2, 91, 71√2.

Code: 915 0 51 714 71 71 713 142 71 204 91 51 166 95 55 312 142 40 311 142 71 40 95 55 517 0 51 510 51 51 244 75 27 243 99 27 122 111 39 403 142 0 123 111 27 184 93 9 183 111 9 94 102 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)

91
71√2
71
20√2
16√2
31√2
31
4√2
51
51√2
24√2
24
12√2
40
12
18√2
18
9√2