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 ...

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 ...

Using a compass is an essential skill. It’s like having a mental roll of duct tape: You don’t know when you’re going to use it, and it might kick around unused for a long time, but when you’re in a ...