Home Geometry Euclid's Elements         By Antonio Gutierrez
Euclid's Elements Book I, Proposition 9: To bisect a rectilinear angle.
Level: High School, SAT Prep, College geometry.

Let the angle AOB be the given rectilinear angle. It is the required to bisect it. Post a comment.

Book I, Proposition 9, To bisect an angle


The Elements: Books I-XIII

Euclid's Elements is the oldest mathematical and geometric treatise consisting of 13 books written by Euclid in Alexandria c. 300 BC. It is a collection of definitions, postulates, axioms, 467 propositions (theorems and constructions), and mathematical proofs of the propositions.

The Thirteen Books of the Elements by Euclid

In its broad sense, education refers to any act or experience that has a formative effect on the mind, character, or physical ability of an individual...In its technical sense education is the process by which society, through schools, colleges, universities, and other institutions, deliberately transmits its cultural heritage--its accumulated knowledge, values, and skills--from one generation to another. George F. Kneller, Introduction to the Philosophy of Education (New York: John Wiley and Sons, 1971.) 

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