Non-ultraperfect Perfect Isosceles Right Triangled Square

Title: e 10:23PA1of2

Order: 10

Horizontal side: 23 Vertical side: 23

Elements: 2, 2√2, 4, 3√2, 6, 6√2, 9, 7√2, 14, 23.

Code: 237 0 23 143 23 9 20 9 9 21 11 9 65 11 3 64 17 3 93 23 0 70 7 7 41 11 7 34 14 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:

• e = elegant. No tiling is just a T-junction. Such tilings may be considered aesthetically pleasing.
• p/r = pseudotriangular/rectangular inclusion subdivided into at least 6/5 triangles respectively.

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)