Non-ultraperfect Perfect Isosceles Right Triangled Square

Title: _ 10:15PA2of2

Order: 10

Horizontal side: 15 Vertical side: 15

Elements: 2, 2√2, 3, 4, 3√2, 5, 4√2, 7, 8, 15.

Code: 157 0 15 83 15 7 30 7 7 31 10 7 57 10 7 73 15 0 40 4 4 41 8 4 22 10 2 21 10 4

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)