High School Math : How to find the perimeter of a rectangle in pre-algebra

Study concepts, example questions & explanations for High School Math

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Example Questions

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Example Question #11 : How To Find The Perimeter Of A Rectangle In Pre Algebra

A rectangle has a width of  feet and a length of  feet. What is the perimeter of the rectangle? 

Possible Answers:

 square feet 

 feet 

 square feet 

 feet 

 feet 

Correct answer:

 feet 

Explanation:

Recall that perimeter is the sum of all of the sides of a shape. Thus, we are adding up all sides of the rectangle. A rectangle has two sides that are the length and two sides that are the width. Thus, 

 feet. 

Perimeter is a measure of length, and not area (or square feet), so our units are just feet. 

Example Question #651 : High School Math

Rectangle ABCD is subdivided into two identical square regions. If the area of each square is , what is the perimeter of ABCD

Possible Answers:

Correct answer:

Explanation:

Given that the area of each square is , the side length of each square is . To find the perimeter of the entire shape, one must add up the lenghts of the sides of the shape. Thus the sides of the rectangle are each , and the bases are  (because the squares are connected). Adding them all together gives us .

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