ISEE Middle Level Math : How to find the area of a square

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #21 : Geometry

Which of the following is equal to the area of a square with perimeter 8 meters?

Possible Answers:

\(\displaystyle 40,000 \textrm{ cm}^{2}\)

\(\displaystyle 80,000 \textrm{ cm}^{2}\)

\(\displaystyle 160,000 \textrm{ cm}^{2}\)

\(\displaystyle 20,000 \textrm{ cm}^{2}\)

Correct answer:

\(\displaystyle 40,000 \textrm{ cm}^{2}\)

Explanation:

The sidelength of a square is one-fourth its perimeter, so the sidelength here is one-fourth of 8, or 2, meters. One meter is equal to 100 centimeters, so the sidelength is 200 centimeters. Square this to get the area:

\(\displaystyle 200 ^{2} = 200 \times 200 = 40,000\) square centimeters.

Example Question #22 : Geometry

Which of the following is the area of a square with perimeter 7 feet?

Possible Answers:

\(\displaystyle 729 \textrm{ in}^{2}\)

\(\displaystyle 441 \textrm{ in}^{2}\)

\(\displaystyle 961 \textrm{ in}^{2}\)

\(\displaystyle 529 \textrm{ in}^{2}\)

Correct answer:

\(\displaystyle 441 \textrm{ in}^{2}\)

Explanation:

Convert  7 feet to inches by multiplying by 12: \(\displaystyle 7 \times 12 = 84\) inches.

The sidelength of a square is one-fourth its perimeter, so the sidelength here is one-fourth of 84 inches. This is \(\displaystyle 84 \div 4 = 21\) inches.

Square this to get the area:

\(\displaystyle 21 ^{2} = 21 \times 21 = 441\) square inches

Example Question #1 : How To Find The Area Of A Square

What is the area of a square with a side length of 4?

Possible Answers:

12

14

8

4

16

Correct answer:

16

Explanation:

The area of a square is represented by the equation \dpi{100} Area = side^{2}\(\displaystyle \dpi{100} Area = side^{2}\).

Therefore the area of this square is \dpi{100} 4^{2}=16\(\displaystyle \dpi{100} 4^{2}=16\).

Example Question #1 : How To Find The Area Of A Square

Square A has sides measuring 5 meters.  A second square, Square B, has sides that are 2 meters longer than the sides of Square A.  What is the difference in area of Square A and Square B?

Possible Answers:

\(\displaystyle 49\ m^2\)

\(\displaystyle 24\ m^{2}\)

\(\displaystyle 8\ m^2\)

\(\displaystyle 9\ m^2\)

\(\displaystyle 21\ m^2\)

Correct answer:

\(\displaystyle 24\ m^{2}\)

Explanation:

The area of Square A is 5 * 5, or 25 m2.  

Since each of Square B's sides is 2 meters longer, the sides measure 7 meters. Therefore, the area of square B is 49 m2.  

Subtract to find the difference in areas: \(\displaystyle 49-25=24\ m^2\)

Example Question #5 : How To Find The Area Of A Square

The ratio of the length of a side of one square to the length of the side of another square is \(\displaystyle \frac{a}{b}\). Give the ratio of the area of the second square to the area of the first square.

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle \frac{b^2}{a}\)

\(\displaystyle \frac{a^2}{b^2}\)

\(\displaystyle \frac{b^2}{a^2}\)

\(\displaystyle \frac{b}{a^2}\)

Correct answer:

\(\displaystyle \frac{b^2}{a^2}\)

Explanation:

The area of a square can be found as follows:

 

\(\displaystyle Area=x^2\)

 

Where:

 

\(\displaystyle x=Side\ Length\)

 

So we can write:

 

\(\displaystyle \frac{Area\ 2}{Area\ 1}=\frac{b^2}{a^2}\)

Example Question #6 : How To Find The Area Of A Square

What is the area of a square if the length of one side is \(\displaystyle \sqrt{3}\)?

Possible Answers:

\(\displaystyle \frac{1}{3}\)

\(\displaystyle 3\)

\(\displaystyle 3\sqrt{3}\)

\(\displaystyle 9\)

\(\displaystyle \sqrt{3}\)

Correct answer:

\(\displaystyle 3\)

Explanation:

The area of a square is found by multiplying one side by itself.

\(\displaystyle A=s\times s=s^2\)

We are given the side length, allowing us to solve.

\(\displaystyle s=\sqrt{3}\)

\(\displaystyle A=(\sqrt{3})^2=3\)

Example Question #4 : How To Find The Area Of A Square

A square has an area of 36, and each side is equal to \(\displaystyle 3x\) What is the value of \(\displaystyle x\)?

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 6\)

\(\displaystyle 2\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 2\)

Explanation:

Each side of a square is equal to the square root of the area. The square root of 36 is 6, so each side is 6. Thus, 3x (being a side of the square is equal to 6. This means that x is equal to 2 because 3 times 2 is 6. 

Example Question #5 : How To Find The Area Of A Square

Find the area of a square with side length 10.

Possible Answers:

\(\displaystyle 100\)

\(\displaystyle 40\)

\(\displaystyle 1000\)

\(\displaystyle 50\)

Correct answer:

\(\displaystyle 100\)

Explanation:

To find the area of a square, simply use the formula. Thus,

\(\displaystyle A=s^2=10^2=10*10=100\)

Example Question #1951 : Isee Middle Level (Grades 7 8) Mathematics Achievement

The area of a square is \(\displaystyle 4*side\)?

Possible Answers:

\(\displaystyle False\)

\(\displaystyle True\)

Correct answer:

\(\displaystyle False\)

Explanation:

The area of a square is the side length squared not the side length times \(\displaystyle 4\).

Example Question #4 : How To Find The Area Of A Square

If you are given one side length of a square, you can find the area with that information.

Possible Answers:

True

False

Correct answer:

True

Explanation:

To find the area of a square, you multiple \(\displaystyle length * width\).  But with a square all the sides are equal so the equation really is \(\displaystyle 2* side\) or the side length squared.  Since you are given the side length, you can find the area.

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