In simple terms, we can understand axonometric projections as 3D views of the model we are creating the drawing for, in other terms, the object tilted to a certain degree in comparison to the plane of projection, which is our drawing sheet. There are three common types of axonometric projections: isometric, dimetric, and trimetric. To understand the difference between the three projections, we will examine them in reference to a simple cube. The drawings illustrate the same cube, showing the three types of projection: 

Here are short descriptions illustrating the difference between the three types of axonometric projection: 

• Isometric: Here, angles a, b, and c are equal. Also, lines O-X, O-Y, and O-Z are equal. This projection is the most common projection we will see and use. 
• Dimetric: Here, angles a and b are equal. Also, lines O-Y and O-Z are equal. 
• Trimetric: All the indicated angles and lines are unequal. 

This concludes our brief introduction to axonometric projections. At the level of this book, we will not learn how to generate all of the highlighted views and projections we have covered. However, it is important for us to be able to interpret them.