A measuring wheel you just walk it and it does all the counting
to measure the perimeter we need a figure with boundaries and all the sides with dimensions
You add all the sides
The perimeter would be 16 meters.
Metre.
I would use kilometers.
Perimeter is a length or a distance, just like depth, height, and circumference are. Any unit of length can be used to describe a perimeter. Some good ones are ... - nanometer - inch - kilometer - parsec - furlong - yard - league - mile - light-year.
You could but it would not be a particularly meaningful measure.
Any unit of length will do, for example meters, millimeters, kilometers, light-years, feet, etc.
The measure of a perimeter is the total length of all sides of a geometric shape, so any shape with a combination of sides whose total is 27 would yield this perimeter.
in math terms, the perimeter is the measure around the shape.
I would use a ruler or a tape measure. After I was done, I would express the measurement in centimeters or inches.
Perimeter is in feet and not in square feet