A vertex is a point where two or more straight lines meet.

Hand drafts and sketches are both drawn using 3D modelling apps.

French curves are used when you need to draw straight lines.

The ISO most recommended paper sizes for technical drawings are known as A-Formats.

A scale is the ratio of the dimension appearing on the drawing compared to the corresponding object dimension.

Vanishing points are the points where parallel lines seem to meet to converge and disappear.

In an engineering drawing, non-visible outline (hidden) is shown by short thin dashes.

An orthographic view (OV) is a one-dimensional view which shows only one side of an object and two of its overall dimensions.