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.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: ...