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The perimeter of any pentagon is the sum of its 5 sides. So if a regular pentagon has sides that are 4 long, its perimeter is 20.
If a pentagon, which is a 5-sided figure, has 26.8 for a perimeter, then each side of that regular pentagon is 26.8 divided by 5 = 5.36 long. How do you get 26.8 for the perimeter of a regular pentagon? Use a regular pentagon with 5.36 for a side length.
The perimeter of each pentagon is 25 inches.
Since a pentagon has 5 sides, you divide the perimeter by 5.
A pentagon is a 5-sided figure, and the perimeter is the sum of the lengths of all the sides. A pentagon with 15-inch sides, will have 5 x 15 inches = 75 inches as its perimeter.