**Introduction To Technical Drawing**

Technical drawing boils down to two-dimensional technical drawing (triple projection) and three-dimensional technical drawing (axonometric).

Triple Projections meansdescribing a 3D volume using a frontal, top and side view which are linked by means of a basic Ox,Oy,Oz coordinate system.

Axonometric describes a 3D volume using a 3D representation.

The difference between an axonometric and a perspective is that the lines which are parallel in real life, stay parallel in an axonometric, while the lines which are parallel in perspective converge to the same perspective point.

Also, axonometric can have a scale, which implies the drawing is proportionally smaller than the original, real-life object by a certain standardisedpercentage(100 times smaller, 50 times, 200, 20,etc.).