To find the perimeter of a rectangle quickly, all you need is its length and width.

The way to calculate it is simple and easy to remember:

$P = 2 \times (L + W)$

Here's what the letters mean:

• $P$ stands for the perimeter,
• $L$ is the length,
• $W$ is the width.

Example

Let’s say you have a rectangle that is 5 meters long and 3 meters wide. Here’s how to work it out:

1. First, add the length and the width together:
   $L + W = 5 + 3 = 8$

2. Next, multiply that sum by 2:
   $P = 2 \times 8 = 16$

So, the perimeter of the rectangle is 16 meters!

It’s that simple! Just remember the formula, and you can find the perimeter in no time!