To find the width of a rectangle given the perimeter and the length, do the following: 1. Divide the perimeter by 2 2. Take away the length (or subtract the length)

**EXAMPLE:**

The perimeter of a deck is 48 ft. If the length is 16 ft, what is the width?

**SOLUTION:**

1. Divide the perimeter by 2:

48 divided by 2 = 24

2. Subtract the length from half the perimeter: 24 - 16 = 8

3. State your answer: The width of the deck is 8 ft.

Finding the missing length (L) when perimeter (P) and width (w) are given uses the same 2 steps as finding the width given perimeter and length:

- Divide the perimeter by 2
- Take away the width (or subtract the width). It is because length and width are synonyms, so the words can be interchanged in many cases.

**EXAMPLE:**

The perimeter of a deck is 48 ft. If the width is 8 ft, what is the length?

**SOLUTION:**

1. Divide the perimeter by 2:

48 divided by 2 = 24

2. Subtract the width from half the perimeter: 24 - 8 = 16

3. State your answer: The length of the deck is 16 ft.