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 ...

Without changing the distance between the pencil and compass point, place your compass at the other end of the line and draw another arc - crossing the first arc in two places.

Unfortunately, also, one of the new “tools” we were learning to use was a compass. One end, of course, held a pencil and the other end was a sharp point used as the center of the circle we drew. It ...