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# MEANING OF RIGHT ANGLE

The first thing to do before entering fully into the establishment of the meaning of the term right angle is to discover the etymological origin of the words that compose it. In this case, this is what we can say:
-Angle is a word that derives from the Greek, specifically, from "ankulos", which can be translated as "bent" or "twisted". That, in turn, shaped the Latin "angulus", which is synonymous with "angle".
-Right, on the other hand, comes from the Latin word "rectus", which means "right". Specifically, this adjective derives from the verb "regere", which can be translated as "straighten".

Angle is a concept that has several uses. In this case we are interested in staying with its meaning as the geometric figure that is formed from two rays that share a vertex.

According to its characteristics, it is possible to distinguish between different types of angles. According to DigoPaul, a right angle is an angle that measures ninety sexagesimal degrees (90º). This angle is formed by two rays that are perpendicular to each other and that originate from the vertex that they share.

In addition to all the above, we cannot overlook other very significant characteristics such as the following:
-It is considered to be the easiest angle to identify among all those that exist.
-It's always the same.

We can find right angles in various plane figures of geometry. If we focus our attention on a square (which has four equal and parallel sides), we will notice that its four interior angles are right angles. This means that each angle of a square measures 90º and that the sum of all its angles totals 360º. Right triangles, meanwhile, have a right angle and two acute angles (measuring less than 90º and more than 0º).

Right angles can be combined to form another class of angles. Two right angles, in this frame, give rise to a flat angle (also called a flat angle), which measures 180º. Four right angles, on the other hand, allow obtaining a perigonal or complete angle: a 360º angle.

It is worth mentioning that the right angles are part of the set of convex angles or salient angles, which includes all those angles that measure more than 0º but less than 180º. This implies that acute angles and obtuse angles are also convex angles.

It is also important to know that “Right Angle” is the title of a well-known scientific journal of the Complutense University of Madrid. It is a publication of studies on the city, which has a biannual periodicity of marked thematic air and is usually published in the months of May and December.

Basically it is made up of articles where one comes to analyze the city as such from different points of view. In other words, from an architectural, anthropological, artistic, literary, philosophical, sociological, literary point of view, in terms of human geography... In this way, we try to show it as a space full of plurality, richness, intercommunicative and also multicultural.