It is the sum of the lengths of its 4 sides
The perimeter of a rectangle, like the perimeter of any closed two-dimensional figure, is the distance around it. The perimeter of the rectangle is the sum of two lengths plus two widths.
To find the perimeter of a rectangle you must calculate the lengths of each of the sides and add them all together.
The perimeter is 26 units.
add the lengths of all the sides
You can make a perimeter with side lengths if 3, 3, 3, 3 or you could do a rectangle with side lengths of 4, 4, 2, 2. Finally you could do a rectangle with side lengths of 5, 5, 1, 1.
Possibly 3 by 6
In order to find the perimeter of a 3D rectangle you must gather the lengths of the known sides, calculate the missing rectangular values, and use the formula for perimeter.
Length of rectangle is 18 units and its width is 2 units
To calculate the perimeter of any rectangle, just use the basic definition of perimeter: in this case, you just add the lengths of the four sides.