How to find the perimeter of a polygon?

The question of how to find the perimeter of a polygonis considered in high school, in geometry lessons. To calculate this indicator, it is necessary to measure and add up all sides of a given geometric figure. Thus, the formula for defining the perimeter is as follows: P = a + b + c + ..., where a, b, c are the sides of the polygon.

If the polygon is regular (sides and anglesequal) it is possible to calculate its perimeter a little easier. To do this, you need to measure the length of one of the sides and calculate the number of angles. Then just multiply the number of angles by the side length. Thus, the perimeter of a square, rhombus or regular hexagon is calculated by the formula:
P = a * l, where l is the number of angles (and, as a consequence, sides).