Quadrivium: A Creative Retrieval

See order.
Give an account.

Four demonstrations, one for each art: a pattern in figured number, Euclid’s first construction, a string sounding its ratios, and Mars walking backward. Each ends the same way — with an account in your own words.

The lab’s rhythm

ObserveManipulateExplain

Interactive demonstration · geometry

Construct an equilateral triangle

Open full Euclid Book I module
Construction 1 of 4

Start from the given finite straight line AB.

Continue the inquiry

Sources, people, and connected ideas

Resource libraryOpen the geometry collection →Tradition AtlasTrace proof, ratio, and motion →Teacher StudioTurn this lab into a lesson →