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en.wikipedia.org/wiki/Euclid%27s_Elements

The Elements is a mathematical treatise consisting of 13 books attributed to the ancient Greek .... Book 1 contains 5 postulates (including the famous parallel postulate) and 5 common notions, and covers important topics of plane geometry  ...

mathcs.clarku.edu/~djoyce/java/elements/bookI/bookI.html

When a straight line standing on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing ...

mathcs.clarku.edu/~djoyce/elements/bookI/propI1.html

For one thing, the Elements ends with constructions of the five regular solids in Book XIII, so it is a nice aesthetic touch to begin with the construction of a regular  ...

www.perseus.tufts.edu/hopper/text?doc=Euc.+1

BOOK I. DEFINITIONS. 1. A point is that which has no part. 2. A line is breadthless length. 3. The extremities of a line are points. 4. A straight line is a line which ...

farside.ph.utexas.edu/Books/Euclid/Elements.pdf

The Elements consists of thirteen books. Book 1 outlines the fundamental propositions of plane geometry, includ- ing the three cases in which triangles are  ...

math.furman.edu/~jpoole/euclidselements/eubk1/props.htm

Euclid's Elements. Book I ... If in a triangle two angles be equal to one another, the sides which subtend the equal angles will also be equal to one another.

www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/non_Euclid_Euclid/Elements.html

Definitions, Postulates, Axioms and Propositions of Euclid's Elements, Book I ... A plane angle is the inclination to one another of two lines in a plane which meet ...

www.ask.com/youtube?q=The+Elements+Book+1&v=Q29U3_2PIiM
Feb 18, 2014 ... How to construct an equilateral triangle from a given line segment.

www.amazon.com/Essential-Elements-Strings-Book-Violin/dp/0634038176

Amazon.com: Essential Elements for Strings - Book 1 with EEi: Violin ( 0073999189032): Michael Allen, Robert Gillespie, Pamela Tellejohn Hayes, John Higgins: ...