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

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Example Questions

Example Question #697 : High School Math

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

Possible Answers:

$108\ m^{2}$ $\displaystyle 108\ m^{2}$

$72\ m^{2}$ $\displaystyle 72\ m^{2}$

$64\ m^{2}$ $\displaystyle 64\ m^{2}$

$100\ m^{2}$ $\displaystyle 100\ m^{2}$

$74\ m^{2}$ $\displaystyle 74\ m^{2}$

Correct answer:

$72\ m^{2}$ $\displaystyle 72\ m^{2}$

Explanation:

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

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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 $\displaystyle 27$ and a height of $\displaystyle 21$ ?

Possible Answers:

567 $\displaystyle 567$

617 $\displaystyle 617$

581 $\displaystyle 581$

603 $\displaystyle 603$

Correct answer:

567 $\displaystyle 567$

Explanation:

To find the area of a rectangle we multiply the base by the height. $\displaystyle Area=b*h$

Plug the number $\displaystyle 27$ for base and $\displaystyle 21$ for height into the equation to get $\displaystyle Area=27*21$ .

We then multiply to find the answer for the area is 567 $\displaystyle 567$ .

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

What is the area of a rectangle with a base of $\displaystyle 5$ and a height of $\displaystyle 52$ ?

Possible Answers:

255 $\displaystyle 255$

260 $\displaystyle 260$

248 $\displaystyle 248$

250 $\displaystyle 250$

Correct answer:

260 $\displaystyle 260$

Explanation:

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

Plug the number $\displaystyle 5$ for base and $\displaystyle 52$ for height into the equation to get $\displaystyle Area=5*52$ .

We then multiply to find the answer for the area is 260 $\displaystyle 260$ .

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

The area of a rectangle is $\displaystyle 32$ . If the length of the rectangle is $\displaystyle 8$ , what is the width?

Possible Answers:

$\displaystyle 24$

$\displaystyle 8$

$\displaystyle 12$

$\displaystyle 16$

$\displaystyle 4$

Correct answer:

$\displaystyle 4$

Explanation:

The formula for the area of a rectangle is the length times the width: A=l*w $\displaystyle A=l*w$ .

Plug in our given information:

32=8*w $\displaystyle 32=8*w$

Divide both sides by 8.

$\frac{32}{8}=w$ $\displaystyle \frac{32}{8}=w$

4=w $\displaystyle 4=w$

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

The area of a quadrilateral is $\displaystyle 52$ . If the length of one side is $\displaystyle 4$ , what is the width of the figure?

Possible Answers:

$\displaystyle 13$

$\displaystyle 34$

$\displaystyle 16$

$\displaystyle 48$

$\displaystyle 4$

Correct answer:

$\displaystyle 13$

Explanation:

The area of a quadrilateral is the length times the width, or A=l*w $\displaystyle A=l*w$ . The problem gives us the area and the length, so we can solve:

A=l*w $\displaystyle A=l*w$

52=4*w $\displaystyle 52=4*w$

Divide both sides by $\displaystyle 4$ :

$\frac{52}{4}=w$ $\displaystyle \frac{52}{4}=w$

13=w $\displaystyle 13=w$

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Example Question #5 : How To Find The Area Of A Rectangle In Pre Algebra

What is the area of a rectangle with a length of $\displaystyle 5$ and a width of $\displaystyle 2$ ?

Possible Answers:

$\displaystyle 14$

$\displaystyle 10$

$\displaystyle 7$

$\displaystyle 20$

$\displaystyle 5$

Correct answer:

$\displaystyle 10$

Explanation:

The area of a rectangle is the length times the width: A=l*w $\displaystyle A=l*w$

Plug in our given values and solve:

A=l*w $\displaystyle A=l*w$

A=5*2 $\displaystyle A=5*2$

A=10 $\displaystyle A=10$

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

If a rectangle has an area of $\displaystyle 36$ and a length of $\displaystyle 3$ , what is the width?

Possible Answers:

$\displaystyle 6$

$\displaystyle 4$

$\displaystyle 36$

$\sqrt{12}$ $\displaystyle \sqrt{12}$

$\displaystyle 12$

Correct answer:

$\displaystyle 12$

Explanation:

The formula for the area of a rectangle is A=l*w $\displaystyle A=l*w$

We can plug in our given information to solve:

A=l*w $\displaystyle A=l*w$

36=3*w $\displaystyle 36=3*w$

Divide both sides by $\displaystyle 3$ .

$\frac{36}{3}=w$ $\displaystyle \frac{36}{3}=w$

12=w $\displaystyle 12=w$

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Example Question #701 : High School Math

What is the area of a rectangle with a length of $\small 5$ $\displaystyle \small 5$ and a width of $\small 3$ $\displaystyle \small 3$ ?

Possible Answers:

$\displaystyle 8$

$\displaystyle 15$

7.5 $\displaystyle 7.5$

$\displaystyle 16$

Correct answer:

$\displaystyle 15$

Explanation:

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

$A=l\times w$ $\displaystyle A=l\times w$

We are given both values, so we simply multiply.

$A=5\times 3=15$ $\displaystyle A=5\times 3=15$

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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 $\displaystyle 3$ and a height of $\displaystyle 16$ ?

Possible Answers:

$\displaystyle 48$

$\displaystyle 24$

$\displaystyle 38$

$\displaystyle 19$

Correct answer:

$\displaystyle 48$

Explanation:

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

Plug the number $\displaystyle 3$ for the base and $\displaystyle 16$ for the height into the equation to get A=3*16 $\displaystyle A=3*16$ .

We then multiply to find the answer for the area is $\displaystyle 48$ .

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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 $\displaystyle 15$ and a height of $\displaystyle 4$ ?

Possible Answers:

A=17 $\displaystyle A=17$

A=45 $\displaystyle A=45$

A=60 $\displaystyle A=60$

A=30 $\displaystyle A=30$

Correct answer:

A=60 $\displaystyle A=60$

Explanation:

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

Plug in the number $\displaystyle 15$ for the base and $\displaystyle 4$ for the height to get

$A=4\cdot 15$ $\displaystyle A=4\cdot 15$

We then multiply to find the answer for the area is A=60 $\displaystyle A=60$ .

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

Study concepts, example questions & explanations for High School Math

All High School Math Resources

Example Questions

Example Question #697 : High School Math

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

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

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

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

Example Question #5 : How To Find The Area Of A Rectangle In Pre Algebra

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

Example Question #701 : High School Math

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

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

All High School Math Resources

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