Answer: First of all, in order to begin the process, you need to know
what "PM" means. Quite frankly, that lets me out.
Answer: If you mean perimeter: You have to add the length of all four sides. In other words, twice the length + twice the width, or 2 x (length + width). If you only know the rectangle's length, you simply don't have enough information.
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The length of the rectangle is 18cm. The width of the rectangle is 9cm.
if the length is 36 on a rectangle then what is the width of the rectangle
A = lw Area of a rectangle = length times width
Area is 2 dimensions of length multiplied, in a square and rectangle anyway. If it is a square, you can just square the length (multiply it by itself)
It is the area of the rectangle which is length times width