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 ...

Constructions (accurate drawings) can be made using a ruler, a pair of compasses and a pencil. A line which cuts an angle into two equal side angles is called an angle bisector. In geometry a ...

“Side angle side, side side side, angle side angle, angle angle side.” Many of us with a maths phobia may dread seeing this line. But set it to a catchy tune and a bunch of adorable secondary school ...