Question

A formula for finding the perimeter of a rectangle is P = 2L + 2W. If you know the perimeter (P) and length (L) of a rectangle, which formula can you use to find the width (W)?
A. W = P/2 - L
B. W = P - 2L - 2
C. W = P/2 - 2L
D. W = P/4L

Answer 1

A. w=P/2-L
P=8
L=3
8/2-3
4-3=1

Answer 2

If we have given perimeter (P) and lenght (L) then to find widht (W) we can use W = P/2 - L

Step-by-step explanation:

P = 2L + 2W

-2W = 2L - P

-W = (2L - P)/2

-W = L - P/2

W = P/2 - L

What is a perimeter in math?

Perimeter is the distance around the edge of a shape.

How do we find perimeter?

In order to find the perimeter, or distance around the rectangle, we need to add up all four side lengths. This can be done efficiently by simply adding the length and the width, and then multiplying this sum by 2 since there are two of each side length.

Learn more about Perimeter here

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