The propositions from Euclid's Elements, Book I, that form the basis of geometric constructions.
As always, I'd recommend David Joyce's illustration of Euclid:
[url]http://aleph0.clarku.edu/~djoyce/java/elements/elements.html[/url]
This sketch just has the problems/propositions. Another sketch has some solutions:
[url]http://www.geogebratube.org/material/show/id/50701[/url].
Both sketches have a reduced set of tools to simulate straightedge and compass constructions.
