What is geometry? Detailed answer

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What is geometry? Detailed answer

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What is geometry?

All the time when we are dealing with the shape, size, position of an object in space, we are involved in geometry. When prehistoric people were engaged in weaving or decorating buildings, they used geometry without knowing it. The ancient Egyptians needed geometry to measure the areas of land that were flooded when the Nile flooded. They needed geometry for building purposes when religion forced them to build pyramids for the dead.

The very word "geometry" comes from the Greek words "Earth" and "measure" and is probably a translation of the Egyptian word. At first, geometry was intuitive. This means that the facts were accepted as existing without any attempt to prove it or demonstrate that it really was. But in 600 B.C. e. The Greek scientist Thales developed the idea that there must be ways to prove that geometric facts are true. In geometry, such a truth is called a theorem.

Thales discovered proofs of theorems that people had taken for granted until that time. This was the beginning of evidence-based geometry. Elementary geometry was divided into two parts: plane geometry and the geometry of bodies. In planar geometry, objects that exist in a plane were considered. They had only two dimensions: length and width. The geometry of bodies is the geometry of three dimensions. It deals with objects that have length, width, and height. These are objects such as cones, spheres, cylinders, and so on.

In 280 BC. e. the scientist Euclid, who lived in the Egyptian city of Alexandria, wrote a book on geometry. This book, called "Beginnings", was a textbook for about 2000 years for everyone who wants to study geometry. Today we call elementary geometry Euclidean, but modern scientists have discarded some of Euclid's material as outdated.

Wherever we turn in our lives, everywhere we see the application of the principles of geometry. It can be in the construction of structures and their design, in architecture, interior design, even in the creation of a landscape. And, of course, tools of common use are directly related to geometry, such as the compass, sextant, theodolite used by surveyors.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Why does the highest peak in the world have an English name?

This mountain on the border of Nepal and Tibet, the locals call Chomolungma in Tibetan, and Sagarmatha in Nepalese. British surveyors first dubbed it "Peak No. 1852" in 15, and then named it after Sir George Everest, the head of the Surveyor Survey of British India. For the first time its summit with a height of 8848 m was conquered by New Zealander Edmund Hillary and Sherpa (Nepalese) Tending Norgay.

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