How is perimeter measured

add all sides of the shape together.

Step-by-step explanation:

if a each side of a square was 4 you would get 16.

4+4+4+4=16

The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle. The area is measurement of the surface of a shape.