1). Measure the length of each side.
2). Add up all the individual lengths.
Their sum is the perimeter of the polygon.
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It is the total distance around the figure
If the polygon is a regular polygon then all interior angels are equal to 180-(360/no of sides of the polygon)
area of a polygon is the amount of area inside the polygon. A square is a polygon and its area is the side length squared, ie times itself. Some polygons are harder to find the area of.
Multiply the sides
The exterior angles of any polygon add up to 360 degrees