# Basic Geometry : How to find the length of the side of a square

## Example Questions

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

Reducing the area of a square by 12% has the effect of reducing its sidelength by what percent (hearest whole percent)?

Explanation:

The area of the square was originally

being the sidelength.

Reducing the area by 12% means that the new area is 88% of the original area, or ; the square root of this is the new sidelength, so

Each side of the new square will measure 94% of the length of the old measure - a reduction by 6%.

### Example Question #2 : How To Find The Length Of The Side Of A Square

The circle inscribed inside Square  has circumference 16. To the nearest tenth, evaluate .

Explanation:

The diameter of a circle that is inscribed inside a square is equal to its sidelength , so all we need to do is find the diameter of the circle - which is circumference 16 divided by :

.

### Example Question #3 : How To Find The Length Of The Side Of A Square

Refer to the above figure, which shows equilateral triangle  inside Square . Also, .

Quadrilateral  has area 100. Which of these choices comes closest to ?

Explanation:

Let , the sidelength shared by the square and the equilateral triangle.

The area of  is

The area of Square  is .

By symmetry,  bisects the portion of the square not in the triangle, so the area of Quadrilateral  is half the difference of those of the square and the triangle. Since the area of Quadrilateral is 100, we can set up an equation:

Of the five choices, 20 comes closest.

### Example Question #931 : Basic Geometry

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #932 : Basic Geometry

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #933 : Basic Geometry

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #934 : Basic Geometry

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #11 : How To Find The Length Of The Side Of A Square

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #11 : How To Find The Length Of The Side Of A Square

The perimeter of a square is . What is the length of one side of the square?

Explanation:

Recall how to find the perimeter of a square:

By dividing both sides by , we can write the following:

For the square in question,

### Example Question #13 : How To Find The Length Of The Side Of A Square

The perimeter of a square is . What is the length of one side of the square?