ISEE Middle Level Math : Quadrilaterals

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

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Example Questions

Example Question #51 : Squares

Use the following square to answer the question:

Square2

Find the area.

Possible Answers:

\(\displaystyle 28\text{cm}^2\)

\(\displaystyle 108\text{cm}^2\)

\(\displaystyle 196\text{cm}^2\)

\(\displaystyle 56\text{cm}^2\)

\(\displaystyle \text{There is not enough information to solve the problem.}\)

Correct answer:

\(\displaystyle 196\text{cm}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle \text{area of square} = l \cdot w\)

where is the length and w is the width of the square.

 

Now, given the square

Square2

we can see the length is 14cm.  Because it is a square, all sides are equal.  Therefore, the width is also 14cm. 

Knowing this, we can substitute into the formula.  We get

\(\displaystyle \text{area of square} = 14\text{cm} \cdot 14\text{cm}\)

\(\displaystyle \text{area of square} = 196\text{cm}^2\)

 

Example Question #51 : Quadrilaterals

Find the area of a square with a length of 8in.

Possible Answers:

\(\displaystyle 32\text{in}^2\)

\(\displaystyle 24\text{in}^2\)

\(\displaystyle 56\text{in}^2\)

\(\displaystyle 64\text{in}^2\)

\(\displaystyle 72\text{in}^2\)

Correct answer:

\(\displaystyle 64\text{in}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle \text{area of square} = l \cdot w\)

where is the length and w is the width of the square.

 

So, we know the length of the square is 8in.  Because it is a square, all sides are equal.  Therefore, the width is also 8in. 

Knowing this, we can substitute into the formula.  We get

\(\displaystyle \text{area of square} = 8\text{in} \cdot 8\text{in}\)

\(\displaystyle \text{area of square} = 64\text{in}^2\)

Example Question #51 : Quadrilaterals

Find the area of a square that has a width of 15in. 

Possible Answers:

\(\displaystyle 225\text{in}^2\)

\(\displaystyle 60\text{in}^2\)

\(\displaystyle 125\text{in}^2\)

\(\displaystyle 45\text{in}^2\)

\(\displaystyle 30\text{in}^2\)

Correct answer:

\(\displaystyle 225\text{in}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle \text{area of square} = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, we know the width of the square is 15in.  Because it is a square, all sides are equal.  Therefore, the length is also 15in.

Knowing this, we can substitute into the formula.  We get

\(\displaystyle \text{area of square} = 15\text{in} \cdot 15\text{in}\)

\(\displaystyle \text{area of square} = 225\text{in}^2\)

Example Question #52 : Quadrilaterals

Find the area of a square with a base of 18cm.

Possible Answers:

\(\displaystyle 124\text{cm}^2\)

\(\displaystyle 36\text{cm}^2\)

\(\displaystyle 324\text{cm}^2\)

\(\displaystyle 248\text{cm}^2\)

\(\displaystyle 72\text{cm}^2\)

Correct answer:

\(\displaystyle 324\text{cm}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle \text{area of square} = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, we know the base of the square is 18cm.  Because it is a square, all sides are equal.  Therefore, the length is also 18cm.

Knowing this, we can substitute into the formula.  We get

\(\displaystyle \text{area of square} = 18\text{cm} \cdot 18\text{cm}\)

\(\displaystyle \text{area of square} = 324\text{cm}^2\)

Example Question #53 : Quadrilaterals

Find the area of a square with a width of 13in.

Possible Answers:

\(\displaystyle 169\text{in}^2\)

\(\displaystyle 121\text{in}^2\)

\(\displaystyle 100\text{in}^2\)

\(\displaystyle 144\text{in}^2\)

\(\displaystyle 172\text{in}^2\)

Correct answer:

\(\displaystyle 169\text{in}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle \text{area of square} = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, we know the width of the square is 13in.  Because it is a square, we know all sides are equal.  Therefore, the length is also 13in.

 

Knowing this, we can substitute into the formula. We get

\(\displaystyle \text{area of square} = 13\text{in} \cdot 13\text{in}\)

\(\displaystyle \text{area of square} = 169\text{in}^2\)

Example Question #151 : Plane Geometry

Find the area of a square with a base of 17cm.

Possible Answers:

\(\displaystyle 289\text{cm}^2\)

\(\displaystyle 312\text{cm}^2\)

\(\displaystyle 68\text{cm}^2\)

\(\displaystyle 178\text{cm}^2\)

\(\displaystyle 204\text{cm}^2\)

Correct answer:

\(\displaystyle 289\text{cm}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle A = l \cdot w\)

 

Now, we know the length of the square is 17cm.  Because it is a square, all sides are equal.  Therefore, the width is also 17cm.

Knowing this, we can substitute into the formula.  We get

\(\displaystyle A = 17\text{cm} \cdot 17\text{cm}\)

\(\displaystyle A = 289\text{cm}^2\)

Example Question #31 : How To Find The Area Of A Square

Find the area of a square with a base of 19cm.

Possible Answers:

\(\displaystyle 76\text{cm}^2\)

\(\displaystyle 121\text{cm}^2\)

\(\displaystyle 96\text{cm}^2\)

\(\displaystyle 256\text{cm}^2\)

\(\displaystyle 361\text{cm}^2\)

Correct answer:

\(\displaystyle 361\text{cm}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle A = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, we know the base (or length) of the square is 19cm.  Because it is a square, all sides are equal.  Therefore, the width is also 19cm.

Knowing this, we can substitute into the formula.  We get

\(\displaystyle A = 19\text{cm} \cdot 19\text{cm}\)

\(\displaystyle A = 361\text{cm}^2\)

Example Question #53 : Squares

Use the following square to answer the question:

Square2

Find the area.

Possible Answers:

\(\displaystyle 169\text{cm}^2\)

\(\displaystyle 196\text{cm}^2\)

\(\displaystyle 144\text{cm}^2\)

\(\displaystyle 56\text{cm}^2\)

\(\displaystyle 72\text{cm}^2\)

Correct answer:

\(\displaystyle 196\text{cm}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle A = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, given the square

Square2

we can see the length is 14cm.  Because it is a square, all sides are equal.  Therefore, the width is also 14cm.  Knowing this, we can substitute into the formula.  We get

\(\displaystyle A = 14\text{cm} \cdot 14\text{cm}\)

\(\displaystyle A = 196\text{cm}^2\)

Example Question #54 : Squares

The area of a square is \(\displaystyle 121\text{in}^2\).  Find the length of one side of the square.

Possible Answers:

\(\displaystyle 13\text{in}\)

\(\displaystyle \text{There is not enough information to solve the problem.}\)

\(\displaystyle 22\text{in}\)

\(\displaystyle 12\text{in}\)

\(\displaystyle 11\text{in}\)

Correct answer:

\(\displaystyle 11\text{in}\)

Explanation:

To find the area of a square, we use the following formula:

\(\displaystyle A = x^2\)

where x is the length of one side.

 

Now, we want to find the length of one side, so we will solve for x.  We know the area of the square is \(\displaystyle 121\text{in}^2\).  So, we will substitute.

 

\(\displaystyle 121\text{in}^2 = x^2\)

 

\(\displaystyle \sqrt{121\text{in}^2} = \sqrt{x^2}\)

 

\(\displaystyle 11\text{in} = x\)

 

\(\displaystyle x = 11\text{in}\)

 

Therefore, the length of one side of the square is 11in.

Example Question #52 : Squares

Find the area of a square with a length of 12in.

Possible Answers:

\(\displaystyle 136\text{in}^2\)

\(\displaystyle 144\text{in}^2\)

\(\displaystyle 121\text{in}^2\)

\(\displaystyle 96\text{in}^2\)

\(\displaystyle 48\text{in}^2\)

Correct answer:

\(\displaystyle 144\text{in}^2\)

Explanation:

To find the area of a square, we will use the following formula:

\(\displaystyle A = l \cdot w\)

where l is the length and w is the width of the square.

 

Now, we know the length of the square is 12in.  Because it is a square, all sides are equal.  Therefore, the width is also 12in.  So, we can substitute.

\(\displaystyle A = 12\text{in} \cdot 12\text{in}\)

\(\displaystyle A = 144\text{in}^2\)

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