add all the sides together or if it has two sides the same number, multiply the number by the number of numbers. Also if the shape is not a regular shape break it apart into a shape you know and when you are done add all the perimeters of the shapes you broke apart together. The formula is length times width. Are you a grownup????!!!!! 'Cause that would be WEIRD
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The linear distance around the outside (the perimeter) of the shape. Find by adding all side lengths. Example: Perimeter of a rectangle: 2B + 2H
The boy had to find the area and perimeter of the pentagon.
Add up all the sides together
You have to measure with a ruler and find the perimeter, area, and circumference of anything your measureing.
38cm