In Alexandria, the second largest city in Egypt, one of the greatest mathematicians to ever exist on Earth was born in 325 BCE. This mathematician’s name was Euclid. He is said to be the son of Naucrates. Euclid was named after Euclid of Megara, a philosopher who lived one hundred years before him. Not only was Euclid a mathematician and a scientist, he was an author as well. Euclid’s most well-known writing was a series of books called “The Elements”. The Elements were on subjects like circles, irrational numbers, 3D geometry, plane geometry and number theory. The Elements consist of five postulates and definitions. These books explained simple theories to detailed explanations of what a line is. Although he did not discover most of these he was the first to publish a series about them. Euclid also wrote “Data”, “which looked at what properties of figures can be deducted when other properties were given.” He wrote “On Divisions” “which looked at constructions to divide a figure into two parts with area of given ratio.” “Optics” “was the first Greek book on perspective”. “Phaenomena” was about mathematical astronomy. Euclid also wrote many other books that were lost in history such as Surface Loci, Porisms, Elements of Music, Conics, and Book of Fallacies. He is considered to be the father of geometry because of the theories he discussed in his books. Some of which still have not been proven to be true in this day and age. Although there is very little known about Euclid he is also considered to be the greatest math teacher in the world. In fact after he died in 265 BCE his fellow mathematicians continued to write books under his name.

Worked sited:
http://farside.ph.utexas.edu/euclid.html
http://www.e271.net/~marina/euclid.html
Quotes from:
http://www-gap.dcs.st-and.ac.uk/~history/Biographies/Euclid.html

...EUCLID: The Man Who Created a Math Class
Euclid of Alexandria was born in about 325 BC. He is the most prominent mathematician of antiquity best known for his dissertation on mathematics. He was able to create "The Elements" which included the composition of many other famous mathematicians together. He began exploring math because he felt that he needed to compile certain things and fix certain postulates and theorems. His book included, many of Eudoxus' theorems, he perfected many of Theaetetus's theorems also. Much of Euclid's background is very vague and unknown. It is unreliable to say whether some things about him are true, there are two types of extra information stated that scientists do not know whether they are true or not. The first one is that given by Arabian authors who state that Euclid was the son of Naucrates and that he was born in Tyre. This is believed by historians of mathematics that this is entirely fictitious and was merely invented by the authors. The next type of information is that Euclid was born at Megara. But this is not the same Euclid that authors thought. In fact, there was a Euclid of Megara, who was a philosopher who lived approximately 100 years before Euclid of Alexandria.
Euclid was the leader of a team of mathematicians working at Alexandria. They all contributed to writing the 'complete works of...

...Geometry (Greek γεωμετρία; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modernmathematics, the other being the study of numbers (arithmetic).
Classic geometry was focused in compass and straightedge constructions. Geometry was revolutionized by Euclid, who introduced mathematical rigor and the axiomatic method still in use today. His book, The Elements is widely considered the most influential textbook of all time, and was known to all educated people in the West until the middle of the 20th century.[1]
In modern times, geometric concepts have been generalized to a high level of abstraction and complexity, and have been subjected to the methods of calculus and abstract algebra, so that many modern branches of the field are barely recognizable as the descendants of early geometry.
Early geometry[edit]
The earliest recorded beginnings of geometry can be traced to early peoples, who discovered obtuse triangles in the ancient Indus Valley (see Harappan Mathematics), and ancient Babylonia(see Babylonian mathematics) from around 3000 BC. Early geometry was a collection of empirically discovered principles concerning lengths, angles, areas, and volumes, which were developed to meet some practical need in surveying, construction, astronomy, and...

...Euclid is considered by many as the “Father of Geometry.” A Greek mathematician, Euclid is believed to have lived around 300 BC. He is most known for his contributions to geometry and immaculate proofs. His magnum opus, The Elements, is one of the greatest mathematical works in history, with its use in education still existent until the 20th century.
His areas of math ranged from geometry, algebra, number theories, irrational numbers, and solid geometry. Then, after he was done teaching, he wrote his best work, The Elements. It was based on the works of mathematicians that came before him, who he had much respect for, and his own thoughts and theories. The Elements consists of thirteen books, all written by Euclid and based on methods and beliefs before him. Books 1-6 are all on focused on plane geometry, books 7-9 consist of number theories, and book 10 deals with Exodus's theory of irrational numbers, and books 11-13 deal with solid geometry. It is "remarkable for the clarity with which the theorems and problems are selected and ordered" (Albaugh, 1972). At the time of its introduction, Elements was the most comprehensive and logically rigorous examination of the basic principles of geometry. It survived the eclipse of classical learning, which occurred with the fall of the Roman Empire, through Arabic translations....

...EuclidEuclid was a Greek mathematician and often known as the “Father of Geometry “.He was born around 300 B.C. He taught mathematics in Alexandria, Egypt, at the Alexandria library or "Museum", and that he wrote the most enduring mathematical work of all time, the Stoicheia or Elements, a thirteen volume work. The Elements or Stoicheia is divided into thirteen books. The books go over plane geometry, arithmetic and number theory, irrational numbers, and solid geometry. Euclid organized the known geometrical ideas, starting with simple definitions, axioms; formed statements called theorems, and set forth methods for logical proofs. He began with accepted mathematical truths, axioms and postulates, and demonstrated logically 467 propositions in plane and solid geometry. One of the proofs was for the theorem of Pythagoras or now known as Pythagorean Theorem, proving that the equation is always true for every right triangle. The Elements was the most widely used textbook of all time, has appeared in more than 1,000 editions since printing was invented, was still found in classrooms until the twentieth century, and is thought to have sold more copies than any book other than the Bible. Euclid used an approach called the "synthetic approach" to present his theorems. Using this method, one progresses in a series of logical steps from the known to the...

...Geometry was throughly organized in about 300 B.C, when the Greek mathematician, Euclid gathered what was known at the time; added original book of his ownand arranged 465 propositions into 13 books called Elements.
Geometry is the mathematics of space and shape, which is the basis of all things that exist. Understanding geometry is necessary step by understanding how the things in our world exist. The applications ofgeometry in real life are not always evident to teenagers, but the reality is geometry infiltratesevery facet of our daily living.
Geometry was recognized to be not just for mathematicians. Anyone can benefit from the basic learning of geometry, which is to follow the lines reasoning. Geometry is one of the oldest sciences and is corcerned with questions of shape, size and relative position of figures and with properties of space.
Geometry is considered an important field pf study because of its applications in daily life.
Geometry is mainly divided in to two which is plane geometry and solid geometry. Plane geometry is about all kinds of two dimensional shapes such as lines, circles, and triangles. While Solid geometry is about all kinds of three dimensional shapes like polygons, prisms, pyramids, sphere and cylinder.
Now, let’s...

...Euclid, also known as Euclid of Alexandria, was a Greek mathematician, often referred to as the "Father of Geometry". He was active in Alexandria during the reign of Ptolemy I (323–283 BC). His Elements is one of the most influential works in the history of mathematics, serving as the main textbook for teaching mathematics(especially geometry) from the time of its publication until the late 19th or early 20th century. In the Elements, Euclid deduced the principles of what is now called Euclidean geometry from a small set of axioms. Euclid also wrote works on perspective, conic sections, spherical geometry, number theory and rigor.
"Euclid" is the anglicized version of the Greek name meaning "Good Glory".
Life
Little is known about Euclid's life, as there are only a handful of references to him. The date and place of Euclid's birth and the date and circumstances of his death are unknown, and only roughly estimated in proximity to contemporary figures mentioned in references. No likeness or description of Euclid's physical appearance made during his lifetime survived antiquity.
The few historical references to Euclid were written centuries after he lived, by Proclus and Pappus of Alexandria. Proclus introduces Euclid only briefly in his fifth-century Commentary on the Elements, as the author of Elements,...

...Introduction
"Geometry," meaning "measuring the earth," is the branch of math that has to do with spatial relationships. In other words, geometry is a type of math used to measure things that are impossible to measure with devices. For example, no one has been able take a tape measure around the earth, yet we are pretty confident that the circumference of the planet at the equator is 40,075.036 kilometres (24,901.473 miles) . How do we know that? The first known case of calculating the distance around the earth was done by Eratosthenes around 240 BCE. What tools do you think current scientists might use to measure the size of planets? The answer is geometry.
However, geometry is more than measuring the size of objects. If you were to ask someone who had taken geometry in high school what it is that s/he remembers, the answer would most likely be "proofs." (If you were to ask him/her what it is that s/he liked the least, the answer would probably be "proofs.") A study of Geometry does not have to include proofs. Proofs are not unique to Geometry. Proofs could have been done in Algebra or delayed until Calculus. The reason that High School Geometry almost always spends a lot of time with proofs is that the first great Geometry textbook, "The Elements," was written exclusively with proofs.
This textbook is based on Euclidean (or elementary)...

...Euclidean GeometryGeometry was thoroughly organized in about 300 BC, when the Greek
mathematician Euclid gathered what was known at the time, added original work of
his own, and arranged 465 propositions into 13 books, called 'Elements'. The
books covered not only plane and solid geometry but also much of what is now
known as algebra, trigonometry, and advanced arithmetic.
Through the ages, the propositions have been rearranged, and many of the
proofs are different, but the basic idea presented in the 'Elements' has not
changed. In the work facts are not just cataloged but are developed in a
fashionable way.
Even in 300 BC, geometry was recognized to be not just for
mathematicians. Anyone can benefit from the basic learning of geometry, which
are how to follow lines of reasoning, how to say precisely what is intended, and
especially how to prove basic concepts by following these lines of reasoning.
Taking a course in geometry is beneficial for all students, who will find that
learning to reason and prove convincingly is necessary for every profession. It
is true that not everyone must prove things, but everyone is exposed to proof.
Politicians, advertisers, and many other people try to offer convincing
arguments. Anyone who cannot tell a good proof from a bad one may easily be
persuaded in the wrong direction. Geometry provides a simplified universe,...

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