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

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #1 : How To Find The Area Of A Rectangle In Pre Algebra

Find the area of a rectangle with a length of 18 meters and a width of 4 meters. 

Possible Answers:

Correct answer:

Explanation:

The area formula for a rectangle is . Plug in the values and you get 72. Since area is squared, make sure your units are squared as well.

Example Question #2 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a base of  and a height of ?

Possible Answers:

Correct answer:

Explanation:

To find the area of a rectangle we multiply the base by the height. 

Plug the number  for base and  for height into the equation to get .

We then multiply to find the answer for the area is .

Example Question #2 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a base of  and a height of ?

Possible Answers:

Correct answer:

Explanation:

To find the area of a rectangle we multiply the base by the height. 

Plug the number  for base and  for height into the equation to get .

We then multiply to find the answer for the area is .

Example Question #2 : How To Find The Area Of A Rectangle In Pre Algebra

The area of a rectangle is . If the length of the rectangle is , what is the width?

Possible Answers:

Correct answer:

Explanation:

The formula for the area of a rectangle is the length times the width: .

Plug in our given information:

Divide both sides by 8.

Example Question #3 : How To Find The Area Of A Rectangle In Pre Algebra

The area of a quadrilateral is . If the length of one side is , what is the width of the figure?

Possible Answers:

Correct answer:

Explanation:

The area of a quadrilateral is the length times the width, or . The problem gives us the area and the length, so we can solve:

Divide both sides by :

Example Question #2 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a length of  and a width of ?

Possible Answers:

Correct answer:

Explanation:

The area of a rectangle is the length times the width: 

Plug in our given values and solve:

Example Question #4 : How To Find The Area Of A Rectangle In Pre Algebra

If a rectangle has an area of  and a length of , what is the width?

Possible Answers:

Correct answer:

Explanation:

The formula for the area of a rectangle is 

We can plug in our given information to solve:

Divide both sides by .

Example Question #3 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a length of  and a width of ?

Possible Answers:

Correct answer:

Explanation:

The area of a rectangle is equal to the product of the length and the width.

We are given both values, so we simply multiply.

Example Question #6 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a base of  and a height of ?

Possible Answers:

Correct answer:

Explanation:

To find the area of a rectangle we multiply the base by the height. 

Plug the number  for the base and  for the height into the equation to get .

We then multiply to find the answer for the area is .

Example Question #7 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a base of  and a height of ?

Possible Answers:

Correct answer:

Explanation:

To find the area of a rectangle we multiply the base by the height.

Plug in the number for the base and  for the height to get

We then multiply to find the answer for the area is .

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