2-1/4 minute video on drawing a pentagon with a compass set only once.
This method makes for a very quick pentagon construction, based upon a known number: the length of one side. It is considered an approximate pentagon because the angles it creates are not actually 108-degrees, which would be the case with a perfect, regular pentagon. Instead, it produces angles that are about 1/4th of a degree off. This means it is pretty good.
The tools used are:
straight edge pencil compass
