Squaring.net >> IRTS >> NPIRTSS >> Order 9

Non-ultraperfect Perfect Isosceles Right Triangled Square

Title: r 9:11PA1of4

Order: 9

Horizontal side: 11 Vertical side: 11

Elements: 1, 1√2, 2, 2√2, 3, 4, 4√2, 7, 11.

Code: 117 0 11 73 11 4 40 4 4 41 8 4 17 8 4 16 8 3 27 9 4 26 9 2 35 8 0

The fact that every NPIRTS has a subdivided triangle is not recorded as a property. The properties below may precede order:side in a tiling's title:

Credit for Discovery

Jasper D. Skinner found many NPIRTS's before this catalogue was built by Geoffrey H. Morley. Only the two lowest order NPIRTS's are attributed to discoverers:

J. Douglas and E.P. Starke (D&S, United States) (7:10PA only)

Arthur H. Stone (AHS, United States, 1916-2000) (7:7PA only)

11
7
4√2
4
1
1√2
2
2√2
3