Simple machines
gear
incisal
the sharp is called the teeth and the cutting edge is the blade
its called "teeth".....my English teacher told me that
A simplistic answer is: A cog wheel is a circular disc that has teeth round the edge. These teeth usually mesh with the teeth of another cog. If one cog is turned, the other cog moves too. The cogs can be made from metal or plastic.
The blank spaces around the edge of a page are called margins.
be on edge (teeth), set on edge (teeth)
The ridges around the edge of a dime is called reeding or milling. There are 118 ridges.
The perimeter
Perimeter
edge of an area
The 2008 Ford Edge has front wheel drive.
The 2013 Ford Edge has front wheel drive.