GMT helps you teach and learn Descriptive Geometry with an interactive 3D space, 2D projection tools and organized worksheets.
Descriptive Geometry is a field of geometry that represents 3D objects on a 2D plane using well‑defined methods.
Originating with Gaspard Monge, these techniques allow imaginary objects to be modeled and viewed from any angle while preserving size, shape and proportions on a flat surface.
In the Portuguese curriculum, Descriptive Geometry is taught through the orthographic projection method, representing 3D objects in 2D.
This approach strengthens spatial visualization and the interpretation of technical drawings—skills essential to engineering, design and architecture.
It is foundational across engineering, architecture, design and the arts.
The method relies on two projection planes—the horizontal and the frontal plane.
To transform a 3D object into 2D, the Monge method ‘folds’ both planes, merging them into a single flat layout.
Traditional chalk‑and‑board teaching can be static and time‑consuming, making complex exercises hard to demonstrate and concepts harder to grasp.
Because spatial visualization is not innate for everyone, students may disengage; teachers spend more time drawing than exploring ideas, and dynamic feedback is limited.
The solution to these problems is GMT, a Descriptive Geometry tool that allows the dynamic and interactive representation of geometric elements in 2D and 3D systems.
Explore the Monge method in 3D: move elements, observe projections and build spatial understanding with direct manipulation.
Create and remove projections, simulate pencil-based constructions and demonstrate complex concepts step-by-step.
Save multiple worksheets for classes, subjects or topics to keep work focused and easy to review.
Use the right window and the toolbox to draw projections and lines, just as you would traditionally on paper.
GMT instantly maps your constructions to the left 3D view according to Monge method rules, visualizing geometry in space.
With auxiliary tools, view the exercise from different perspectives, undo and redo changes, and edit the exercise to your liking.
Illustrate concepts live, build accurate constructions, and share clear steps students can follow.
Practice at your own pace, visualize ideas in 3D and reinforce understanding with guided 2D steps.