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 ...

There are two ways to construct a triangle using a ruler and a protractor. The first is a Side, Angle, Side (SAS) construction where two sides and the angle between them is known. The second is an ...

Use a ruler, protractor and a pair of compasses to construct a triangle accurately. After the triangle has been constructed, leave the construction lines visible so each stage of the process is shown ...