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 ...

If two lines are drawn at right angles to each other, they are said to be perpendicular. A line drawn to cut another line or angle in half is a bisector. The path of a point that moves according to a ...

STEP 2: Put the pin of the compass at the point of the angle. Set the other end of the compass to a point most of the way up one of the lines and draw an arc across each line.