The bevel, what is it? How to choose the best and cheapest?

November 2, 2021

Measurement instruments have arisen from the need of man in the use of tools to make more and more exact measurements. This allows them to make universal calculations for the execution of daily tasks that their results require to be expressed in measures or quantities.

Among those pieces that facilitate measurements we have the bevel; its structure and presentation have been confused with other measurement instruments; For this reason, in this article we will define what it is, its functions, its uses and differences with other instruments.

What is the bevel?

This piece is a scalene right triangle shaped measurement figure , because all its angles are different: one of 30 °, 60 ° and 90 ° of each measure. In other words, it has a right angle and on each of its sides it has a totally different angle. It can be used separately or accompanied by rulers or squares, to obtain different measurement angles.


The bevel was invented by the architect Teodoro de Samos ; Although the exact date of its creation is not known, it lived between the 7th and 6th century BC This creation was accompanied by the invention of other geometric pieces such as the level and the ruler, as well as other tools to make specific measurements, which in their time were a boom for its functionality and versatility , in addition to obtaining exact results. Its name is originally from the old French language which means “to divide into four ” And although there is little data on his invention, it can be said that it was from an isometric perspective.

What parts make up a bevel?

To be a bevel and not to be confused with another geometric piece, this is a single piece in the shape of a triangle with its different angles of 30 °, 60 ° and 90 °. These are made in a single piece, that is, it is not dismountable , and this can be made of transparent plastic material , wood or aluminum that facilitates the view of the gradual scale that it brings for the measurement.

Plastic is the one commonly used by elementary and middle school students because its cost is low and knowing the children can break them. So to replenish them, it is easy and inexpensive. In the case of aluminum and wood, they are the most used by professionals, providing durability and elegance in their work area.


It can be used alone or with rulers or squads. If you decide to use it only to take measurements, place the bevel at the edge of what you want to measure, on the side that has the scale graduated in centimeters, and you will get the measurement.

In the event that you want to make traces, determine certain angles, you must help yourself with other measuring instruments to achieve exact measurements.

Bevel applications

Despite being a simple piece, we can get several uses for the bevel. Among the most common we have:

  • Mainly to take measurements of different types of objects.
  • Its use is also oriented to the realization of parallel lines , regardless of the established distance.
  • It is ideal for drawing perpendicular lines .
  • Used to mark angle measurements.
  • It is used to get the polar coordinates .
  • With the bevel, the midpoint is easily located.
  • Its use is also oriented to obtain symmetry in plane figures.
  • The measure of the vectors can be achieved with the bevel.
  • Triangles can be drawn.
  • Lastly, it is ideal for achieving 30 ° and 60 ° angles.

With the help of the ruler you can:

  • Placing the ruler horizontally, draw vertical lines from the isometric perspective.
  • With the 30 ° angle, axes can be drawn from the horizontal plane.
  • The coordinates corresponding to the parallel axes can be placed in space.
  • In turn, by placing the coordinates of the points on the axes, the perspective of the point can be obtained.

Therefore, its use should not be limited to a single activity or functionality. In addition, we reiterate, accompanied by a square or rule, it has more functionality and prominence.

Who uses the bevel?

Being a geometric figure with different functionalities, it can be used by different professions and different levels of instruction, such as:

  • Students of primary and secondary education.
  • Engineering students.
  • Graphic design students.
  • Architecture students.
  • Professionals from the aforementioned branches.
  • Professionals linked to mathematics.
  • Those who have technical drawing offices.
  • Trades linked to sewing for women and tailoring for men.
  • Trades linked to carpentry.
  • Educators in the classroom.
  • General public who need to take measurements, draw lines or obtain the measure of certain angles.

Importance of the bevel

What has been described, leads us to summarize the importance of this measuring instrument in:

  • It is a piece that since its invention facilitates calculations from an isometric perspective.
  • Its use is so versatile and so simple, because thanks to its accuracy it fulfills its functions without errors. Ideal for making exact calculations and measurements.
  • The multiple uses for different specialties such as architecture, graphic design and engineering, facilitate the work of their professions.
  • Placing two bevels together at their longest angle, the shape of an equilateral triangle is obtained, adding 180 °. This makes it important because it is decisive to measure its angles and sides.
  • It is easy to transport and be purchased in stores alone or accompanied by other geometric pieces to facilitate studies and their calculations in an assertive and fast way.

Differences between the square and the bevel

Taking into consideration that both are useful and essential pieces for the realization of technical and linear drawings, we are aware of the confusion that can be generated between the square and the bevel; we can say that they are similar because the total sum of all their sides is 180 ° but the form of distribution is given differently.

In this video from this Youtube audiovisual production company we leave you a very entertaining explanation

In the case of the square, it has the shape of a figure of an isosceles rectangular triangle, that is, it has an angle of 90 degrees and the other two remaining angles are 45 ° each.

In the case of the bevel, it has a scalene right triangle figure, that is, its three different sides; an angle of 90 degrees and two sides of 30 ° and 60 °.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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