ACT Math : Squares

Study concepts, example questions & explanations for ACT Math

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Example Questions

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

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

Possible Answers:

 

 

 

 

 

Correct answer:

 

Explanation:

The area of a square is very easy. You merely need to square the length of any given side. That is, the area is defined as:

For our data, this is:

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

What is the area of a square with a perimeter of  ft?

Possible Answers:

Not enough information is given.

Correct answer:

Explanation:

For a square all the sides are equal, and there are four sides, so divide the perimeter by 4 to determine the side length. 

.

Next to find the area of a square, square the side length: 

.

Don't forget your units!

Example Question #34 : Squares

Eric has 160 feet of fence for a parking lot he manages. If he is using all of the fencing, what is the area of the lot assuming it is square?

Possible Answers:

Correct answer:

Explanation:

The area of a square is equal to its length times its width, so we need to figure out how long each side of the parking lot is. Since a square has four sides we calculate each side by dividing its perimeter by four.

Each side of the square lot will use 40 feet of fence.

.

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

A square garden is inscribed inside a circular cobblestone path. If the radius of the cobblestone path is  feet, what is the area of the garden?

Possible Answers:

Correct answer:

Explanation:

If a square is inscribed inside a circle, the diameter of the circle is the diagonal of the square. Since we know the radius of the circle is  feet, the diameter must be  feet. Thus, the diagonal of the square garden is  feet.

All squares have congruent sides; thus, the diagonal of a square creates two isosceles right triangles. The ratio of the lengths of the sides of an isosceles right triangle are , where  is the hypotenuse. Thus, to find the length of a side of a square from the diagonal, we must divide by .

The area of a square is , so if one side is , our area is

Thus, the area of our square garden is 

Example Question #161 : Quadrilaterals

Find the area of a square whose side length is .

Possible Answers:

Correct answer:

Explanation:

To find area, simply square the side length. Thus,

Example Question #391 : Geometry

Find the area of a square with side length 5.

Possible Answers:

Correct answer:

Explanation:

To solve, simply use the formula for the area of a square given side length s. Thus,

Example Question #843 : Basic Geometry

Square

A square is circumscribed on a circle with a 6 inch radius. What is the area of the square, in square inches?

Possible Answers:

48

36

24

144

Correct answer:

144

Explanation:

We know that the radius of the circle is also half the length of the side of the square; therefore, we also know that the length of each side of the square is 12 inches.

Square

We need to square this number to find the area of the square.

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

A square garden has an area of 64 square feet. If you add 3 feet to each side, what is the new perimeter of the garden?

Possible Answers:

32

25

121

20

44

Correct answer:

44

Explanation:

By finding the square root of the area of the garden, you find the length of one side, which is 8. We add 3 feet to this, giving us 11, then multiply this by 4 to get 44 feet for the perimeter.

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

The area of the shaded region of a square is 18. What is the perimeter of the square?

Possible Answers:

24

36

28

20

Correct answer:

24

Explanation:

The area of the shaded region, which covers half of the square is 18 meaning that the total area of the square is 18 x 2, or 36. The area of a square is equal to the length of one side squared. Since the square root of 36 is 6, the length of 1 side is 6. The perimeter is the length of 1 side times 4 or 6 x 4.

Example Question #851 : Basic Geometry

The area of a square is .  If the square is enlarged by a factor of 2, what is the perimeter of the new square?

Possible Answers:

Correct answer:

Explanation:

The area of a square is given by  so we know the side is 5 cm.  Enlarging by a factor of two makes the new side 10 cm.  The perimeter is given by , so the perimeter of the new square is 40 cm.

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