Continued proportions in number theory.
compositions
Regular solids
The thirteenth book in Euclids Elements has no specific title, but covers the Pythagorean proofs of Theaetetus (c. 417-369 bc) and the construction of the five regular Platonic solids (pyramid, cube, octahedron, dodecahedron, icosahedron) inside a given sphere.
It has been confirmed that the 8th book is Nevermore.
Previous Answer: Twisted The eight book is Wanted
There are 13 books in Euclid's Elements. The title of Book XIII is " Regular solids."
The eighth book is title Wanted, but the nineth book is titled Twisted
Elements
Elements
'weird' is the word
the 8th word in the 8th chapter title is alarming top tip its not the password its the keyword.
Euclid's accomplishments had to do with geometry. His greatest accomplishment was his book on geometry called Elements. In this book, he mentions conic sections, number theory and more. He is also responsible for Euclidean geometry.