A technician often has to sketch or design ductwork and the other parts of an HVAC system. Sometimes you have to sketch the room or building you are working with. This means working with lines, angles ...

Just have a look at the edges of your desk; the hands of a clock or the keys on your computer. There are examples everywhere. Angles are measured using degrees, ranging from 0 all the way to 360 ...

An angle is a way of describing the space between 2 lines that begin at the same point. An angle is a measure of how much you have to turn one of the lines so that it perfectly overlaps with the other ...