A technician often has to sketch or design ductwork and other parts of an HVAC system. This means working with lines, angles, and other shapes. This article shows you how to draw and work with these ...

A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF ...

Drawing angles You can use a protractor, pencil and ruler to draw an angle that you have been given. Follow these steps to draw the angle P Q R = 60 ∘ ...