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 ...

In maths, a construction is an accurate drawing. Besides constructing triangles, there are two main constructions which can be done using a ruler, a pair of compasses and a pencil: After the ...

If you don’t have a compass on hand and need to draw a large circle, you can turn a few scrap pieces into a beam compass. A speed square can replace a compass for drawing small circles, but a beam ...