Add all measurements of the sides on the figure
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perimeter.
What I think is that the perimeter is the distance around a figure. :)
Divide the irregular figure into manageable pieces and work out their individual areas, sum the areas to that of the original figure. Measure the perimeter.
That's because "perimeter" means the distance around something - not the spaces inside. If you count squares inside a figure, you are finding the AREA, not the PERIMETER.
the perimeter is the sum of all the sides in a figure, and centimeter is a length. so the question is what is the sum of all the sides of a figure in centimeters