Polygons are two dimensional shapes with straight sides. They can be described by the number of sides they have and whether the shape is regular or irregular. Where the straight sides of the polygon ...

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 ...

If a person stands and looks up at an object, the angle of elevation is the angle between the horizontal line of sight and the object. If a person stands and looks down at an object, the angle of ...

A teacher has found a way to deliver his lessons remotely using virtual reality... and Half-Life: Alyx. Charles Coomber, a Multiple-Subjects teacher from San Diego has taken to YouTube to deliver a ...