# What is descriptive geometry?

## What Does descriptive geometry Mean

The geometry is a branch of mathematics devoted to the analysis of the magnitudes and properties of shapes , both in space and in a plane. According to its specific object of study, it is possible to differentiate between different specializations or areas of geometry.

The projective geometry , in this context, is focused on solving problems of the geometry of space through operations carried out on a plane , representing him the figures of the solids .
To understand the definition of descriptive geometry, therefore, we have to understand what various concepts refer to. The geometry of space is that geometry that studies three-dimensional objects : that is, they have three dimensions. The solids are precisely three - dimensional bodies .

Descriptive geometry, in short, enables the representation of three-dimensional space on a two-dimensional surface . In this way it helps to solve questions related to spatial problems, but in two dimensions.
The antecedents of descriptive geometry go back to ancient times. Precisely, there is a large number of drawings that were found in caves belonging to prehistory that show us that need that human beings have always felt to express themselves through drawing to capture representations of their environment . It is important to note that thanks to these creations, today we have a lot of information to try to understand how our ancestors lived, what their needs were and what discoveries they made through observation, for example.
Of course, it was only with the arrival of the Renaissance that human beings began to develop graphics in depth, that is, to include in their drawings this dimensional axis without which we cannot imagine life. With the consolidation of geometric techniques, the representation of the figures of three-dimensional bodies in a plane was perfected and the foundations for technical drawing were laid .
Until the use of depth emerged in graphic representations, it was necessary to make drawings that are very faithful to reality, as if they were photographs, since the depth of objects was not taken into account from a geometric point of view. Mathematics provides a series of conceptual tools that facilitate drawing, since they decompose reality into a series of very simple figures , each with its own properties. Something similar happens with musical notation, which allows us to study and memorize melodies through their analysis, something much less demanding on the brain than the mere process of remembering them raw.

Stonework is one of the disciplines that, at the end of the Middle Ages, gave rise to the creation of highly complex three-dimensional works, especially the stones that were used to join the arches or vaults.
With the passage of time, many people specialized in the use of perspective , and thus the formal foundations of the so-called projective geometry arose , the part of mathematics that focuses on the study of geometric figures without including measurement. It was only in 1795 that the mathematician Gaspard Monge published a work called "Descriptive Geometry . "
The architecture , the topography and engineering are some of the science that appeal to descriptive geometry, which is established as a useful tool for the development of any type of design.
In other words, descriptive geometry is ideal for any discipline that requires the representation of elements on a flat surface , which in the past used to be a sheet of paper and today, the virtual canvas provided by design software.

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