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
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
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
-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
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
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.