Regular solids
geometry
13 of them.
There are 13 books. Book 13 is about regular solids.
The chapters in Euclid's Elements are called books, there are thirteen in all.
There are 13 books in Euclid's Elements.
euclids elements
Regular solids
His mathematical books called Elements. His work on geometry, particularly his famous axioms.
'Elements' was written by Euclid.
compositions
euclids elements
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.
need a simple explanation of Euclids theory.
There are 13 books making up Euclid's 'Elements'.
There are 13 books in Euclid's Elements, each covering different aspects of geometry and mathematics.
There are thirteen books in Euclid's Elements.