Non-Modular Triangles: 27

The non-modular triangles on this page were all designed by Tomoko Fuse. Each lid required one sheet of paper and each base required one sheet of paper. Tomoko specifies A4 size paper (210 mm by 297 mm), but her instructions allow for significant adjustments to the sheet size. I've been able to vary the dimensions even more than what is shown in her book, producing boxes of many different sizes.
 
Triangles are easier to make than other non-modular shapes. I would recommend to beginners that they start with triangles before attempting squares and pentagons.