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 ...

Draw the given side of the triangle using a ruler. Use a protractor to measure the given angle at the left-hand endpoint of the given side. Mark the angle and then draw a line from the endpoint ...

Many a mathematician has received a long letter from an unknown sender who claims to have found a way to trisect an angle using only a straightedge and compass. The mathematician may read passages of ...