Perimeter - the total length of the boundaries that limit the geometric shape of the plane. «Perimeter» is used to refer to both the length of the borders of the figure, and for the own borders.
Perimeter and area are the two major dimensions of geometric figures, they are often confused. Often also believe that the increase of one of these variables results in an increase in the other. However, there is no connection between the area and perimeter of figures.
It is measured in units of length.
For typical figures can be calculated using the following tools: