Establishing the etymological origin of the term octagon leads us to leave a patent that derives from the Greek. Specifically, it emanates from the sum of two words of that language that result in the meaning “geometric body that has eight angles”:

• "okto", which can be translated as "eight".

• “Gono”, which is synonymous with “angle”.

The Greek term derived in Latin *octagōnos*, which came to our **language** as **octagon** or **octagon** . Both versions are accepted by the **dictionary** of the **Royal Spanish Academy (RAE)** , which refers to its meaning as a polygon that has 8 sides and, therefore, 8 angles.

By adding the interior angles of one of these geometric figures, the result will be **6 pi radians** or **1080º** . It is important to emphasize, however, that we can distinguish between different classes of octagons.

He **regular octagon** It is one whose 8 sides and angles are equal. This means that the union of each side forms an angle that measures **135º** : If we already mentioned that the sum of the internal angles of an octagon always gives 1080º and in the case of regular octagons all the angles are equal, we must only divide 1080º by 8 angles to know how much an angle measures.

In a similar sense, it is easy to calculate the perimeter of a regular octagon. We should only know the length of one of the **sides** and then multiply it by 8, since all sides are equal and the perimeter is the sum of the lengths of those sides.

In the **irregular octagons** , which have sides of different length, these properties are not met.

We cannot ignore that there is also what is known as the energy octagon. This is a term that is used within the scope of the stars, esotericism, clairvoyance ... With it refers to an eight-sided symbol that is considered to be a great tool to attract good energy and positivity. So much so that it is believed that through this the cells of the body recover, renew and that results in the disappearance of pains and diseases of all kinds.

It is also said that this is the result of the sum of three octagons of different sizes: the boy, who is the one in relation to both earthly and divine love; the medium, which refers to the spirit and unconditional love; and the big one, which becomes the mixture of transmutation, healing and unconditional love.

By joining these three elements, the aforementioned energy octagon is achieved, which, in addition to the above, is considered to combat cases of impotence, end stress, clean the aura of the person in question, improve energy and avoid that the arrival of negative forces occurs.

It is known as octagon, finally **ring** where certain mixed martial arts fights take place. As it is easy to suppose, this name obeys the form of **stage** It hosts the fights. For example: *"The Brazilian fighter only lasted a minute in the octagon before being knocked out by his opponent"*.