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Pre-Algebra : Area

Study concepts, example questions & explanations for Pre-Algebra

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11 Diagnostic Tests 177 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #31 : Area Of A Rectangle Or Square

What is the area of a square with a side length of $\displaystyle 20$ inches?

Possible Answers:

200 $\displaystyle 200$ in^2 $\displaystyle in^2$

500 $\displaystyle 500$ in^2 $\displaystyle in^2$

100 $\displaystyle 100$ in^2 $\displaystyle in^2$

800 $\displaystyle 800$ in^2 $\displaystyle in^2$

400 $\displaystyle 400$ in^2 $\displaystyle in^2$

Correct answer:

400 $\displaystyle 400$ in^2 $\displaystyle in^2$

Explanation:

To find the area of a square, simply multiply the side length by itself. Because the side length of the square in question is $\displaystyle 20$, the best answer is:

$20\times 20 =400$ $\displaystyle 20\times 20 =400$

400 $\displaystyle 400$ in^2 $\displaystyle in^2$

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Example Question #32 : Geometry

The short side of a rectangle measures $\displaystyle 3$ inches, and the long side measures $\displaystyle 7$ inches. What is its area?

Possible Answers:

$\displaystyle 21$ in^2 $\displaystyle in^2$

$\displaystyle 23$ in^2 $\displaystyle in^2$

$\displaystyle 18$ in^2 $\displaystyle in^2$

$\displaystyle 27$ in^2 $\displaystyle in^2$

$\displaystyle 20$ in^2 $\displaystyle in^2$

Correct answer:

$\displaystyle 21$ in^2 $\displaystyle in^2$

Explanation:

To find the area of a rectangle, multiply the length of the long side by the length of the short side.

The best answer is:

$3\times 7=21$ $\displaystyle 3\times 7=21$

$\displaystyle 21$ in^2 $\displaystyle in^2$

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Example Question #33 : Geometry

A rectangle measures $\displaystyle 4$ inches on its short side, and $\displaystyle 5$ inches on its long side. What is its area?

Possible Answers:

$\displaystyle 28$ in^2 $\displaystyle in^2$

$\displaystyle 23$ in^2 $\displaystyle in^2$

$\displaystyle 30$ in^2 $\displaystyle in^2$

$\displaystyle 20$ in^2 $\displaystyle in^2$

$\displaystyle 15$ in^2 $\displaystyle in^2$

Correct answer:

$\displaystyle 20$ in^2 $\displaystyle in^2$

Explanation:

To find the area of a rectangle, multiply the length of the long side by the length of the short side.

The best answer is:

$4 \times 5=20$ $\displaystyle 4 \times 5=20$

$\displaystyle 20$ in^2 $\displaystyle in^2$

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Example Question #34 : Geometry

What is the area of a square with a side length of $\displaystyle 19$ inches?

Possible Answers:

381 $\displaystyle 381$ square inches

361 $\displaystyle 361$ square inches

371 $\displaystyle 371$ square inches

351 $\displaystyle 351$ square inches

341 $\displaystyle 341$ square inches

Correct answer:

361 $\displaystyle 361$ square inches

Explanation:

To find the area of a square, simply multiply the side length by itself. Because the side length of the square in question is $\displaystyle 19$ inches, the best answer is:

361 $\displaystyle 361$ square inches

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Example Question #35 : Geometry

What is the area of a square with a side length of 22.5 $\displaystyle 22.5$ inches?

Possible Answers:

506.55 $\displaystyle 506.55$ square inches

506.20 $\displaystyle 506.20$ square inches

506.65 $\displaystyle 506.65$ square inches

506.25 $\displaystyle 506.25$ square inches

506 $\displaystyle 506$ square inches

Correct answer:

506.25 $\displaystyle 506.25$ square inches

Explanation:

To find the area of a square, simply multiply the side length by itself. Because the side length of the square in question is 22.5 $\displaystyle 22.5$, the best answer is:

506.25 $\displaystyle 506.25$ square inches

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Example Question #36 : Geometry

A rectangle measures $\displaystyle 6$ inches on its short side, and $\displaystyle 11$ inches on its long side. What is its area?

Possible Answers:

$\displaystyle 36$ square inches

662 $\displaystyle 662$ square inches

$\displaystyle 76$ square inches

$\displaystyle 66$ square inches

166 $\displaystyle 166$ square inches

Correct answer:

$\displaystyle 66$ square inches

Explanation:

To find the area of a rectangle, multiply the length of the long side by the length of the short side. The best answer is:

$\displaystyle 66$ square inches

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Example Question #37 : Geometry

A rectangle measures $\displaystyle 5$ inches on its short side, and $\displaystyle 18$ inches on its long side. What is its area?

Possible Answers:

$\displaystyle 70$ square inches

$\displaystyle 90$ square inches

100 $\displaystyle 100$ square inches

$\displaystyle 80$ square inches

$\displaystyle 60$ square inches

Correct answer:

$\displaystyle 90$ square inches

Explanation:

To find the area of a rectangle, multiply the length of the long side by the length of the short side. The best answer is:

$\displaystyle 90$ square inches

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Example Question #31 : Area

A table measures three feet by twenty feet. What is the area of the table?

Possible Answers:

$\displaystyle 40$ square feet

$\displaystyle 80$ square feet

$\displaystyle 50$ square feet

$\displaystyle 70$ square feet

$\displaystyle 60$ square feet

Correct answer:

$\displaystyle 60$ square feet

Explanation:

To find the area of a rectangle, multiply the length of the long side by the length of the short side. The best answer is:

$\displaystyle 60$ square feet

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Example Question #32 : Area

A square table measures five and a half feet along its sides. What is its area?

Possible Answers:

30.35 $\displaystyle 30.35$ square feet

25.25 $\displaystyle 25.25$ square feet

30.25 $\displaystyle 30.25$ square feet

35.15 $\displaystyle 35.15$ square feet

30.45 $\displaystyle 30.45$ square feet

Correct answer:

30.25 $\displaystyle 30.25$ square feet

Explanation:

To find the area of a square, simply multiply the side length by itself. Because the side length of the square in question is 5.5 $\displaystyle 5.5$ feet, the best answer is:

30.25 $\displaystyle 30.25$ square feet

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Example Question #40 : Geometry

Find the area of a rectangle with a width of 4cm and a length that is two times the width.

Possible Answers:

$32\text{cm}$ $\displaystyle 32\text{cm}$

$24\text{cm}^2$ $\displaystyle 24\text{cm}^2$

$24\text{cm}$ $\displaystyle 24\text{cm}$

$32\text{cm}^2$ $\displaystyle 32\text{cm}^2$

$16\text{cm}^2$ $\displaystyle 16\text{cm}^2$

Correct answer:

$32\text{cm}^2$ $\displaystyle 32\text{cm}^2$

Explanation:

The formula for the area of a rectangle is

$A = l \cdot w$ $\displaystyle A = l \cdot w$

where l is the length of the rectangle, and w is the width.

We know the width of the rectangle is 4cm. The length is two times the width, so the length is 8cm. Now, we substitute. We get

$A = 8\text{cm} \cdot 4\text{cm}$ $\displaystyle A = 8\text{cm} \cdot 4\text{cm}$

$A = 32\text{cm}^2$ $\displaystyle A = 32\text{cm}^2$

Therefore, the area of the rectangle is $32\text{cm}^2$ $\displaystyle 32\text{cm}^2$

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Pre-Algebra : Area

Study concepts, example questions & explanations for Pre-Algebra

All Pre-Algebra Resources

Example Questions

Example Question #31 : Area Of A Rectangle Or Square

Example Question #32 : Geometry

Example Question #33 : Geometry

Example Question #34 : Geometry

Example Question #35 : Geometry

Example Question #36 : Geometry

Example Question #37 : Geometry

Example Question #31 : Area

Example Question #32 : Area

Example Question #40 : Geometry

All Pre-Algebra Resources

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