You add the lengths of all the sides. If one "side" is a part of a circle, find the length of it and add it to the other sides.
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To find the perimeter of a figure, add all the lengths of the edges of the figure. The sum of the sides is the perimeter.
It means you have found the distance around that figure.
To find the perimeter of two-dimensional shapes, add the lengths of all the sides together. The sum is the perimeter of the figure.
The distance round a closed figure is the perimeter.
a irregular figure is not a particular shape it may have two or more figures in to make a irregular figure