What is a straight line?

The word "direct" has several meanings. For example, the so-called several rivers on the territory of Russia. But the main meaning of the term "direct" is related to the area of ​​geometry.

"Direct" in geometry

Despite the fact that the geometry is one of theexact sciences, scientists can not unequivocally define the term "direct". In the most general form, one can give the following definition: "A straight line is a line along which is equal to the distance between two points".

With this term in geometry, there are manytheorems, scientific reasoning, equations and axioms. One can recall, for example, some properties of a straight line from Euclidean geometry that have become known to the entire scientific community: "Through infinitely many straight lines can be drawn through any point" or "Only one straight line can be drawn through two different points", etc. Also in school In the lesson of geometry, you will certainly hear "Parallel straight lines do not intersect."

Other definitions you can find in the category of our site: Definitions.