ISEE Upper Level Math : Squares

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

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Example Questions

Example Question #11 : Squares

Side  shown in the diagram of square  below is equal to 21cm. What is the area of ?

342px-square_-_geometry.svg

Possible Answers:

Cannot be determined

Correct answer:

Explanation:

To find the area of a quadrilateral, multiply length times width. In a square, since all sides are equal,  is both the length and width.

Example Question #12 : Squares

If Amy is carpeting her living room, which meaures feet by feet, how many square feet of carpet will she need?

Possible Answers:

Correct answer:

Explanation:

To find the area of the floor, multiply the length of the room by the width (which is the same forumla used to find the area of a square).  The equation can be written:

Substitute feet for and feet for :

Amy will need of carpet.

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

A rectangle and a square have the same perimeter. The rectangle has length  centimeters and width  centimeters. Give the area of the square.

Possible Answers:

Correct answer:

Explanation:

The perimeter of the rectangle is

 centimeters.

This is also the perimeter of the square, so divide this by  to get its sidelength:

 centimeters.

The area is the square of this, or  square centimeters.

Example Question #13 : Squares

Four squares have sidelengths 4 inches, 8 inches, 12 inches, and 16 inches. What is the average of their areas?

Possible Answers:

Correct answer:

Explanation:

The areas of the four squares can be calculated by squaring their sidelengths. Add these areas, then divide by 4:

 square inches

Example Question #14 : Squares

Which of the following is equal to the area of a square with sidelength  yards?

Possible Answers:

Correct answer:

Explanation:

Multiply the sidelength by 36 to convert from yards to inches:

Square this to get the area:

 square inches

Example Question #15 : Squares

What is the area of a square in which the length of one side is equal to ?

Possible Answers:

Correct answer:

Explanation:

The area of a square is equal to the product of one side multiplied by another side. Therefore, the area will be equal to:

The next step is to convert the fractions being added together to a form in which they have a common denominator. This gives us:

Example Question #17 : Squares

One of the sides of a square on the coordinate plane has its endpoints at the points with coordinates  and . What is the area of this square?

Possible Answers:

Correct answer:

Explanation:

The length of a segment with endpoints  and  can be found using the distance formula with :

This is the length of one side of the square, so the area is the square of this, or 122.

Example Question #18 : Squares

One of the sides of a square on the coordinate plane has its endpoint at the points with coordinates  and , where  and  are both positive. Give the area of the square in terms of  and .

Possible Answers:

Correct answer:

Explanation:

The length of a segment with endpoints  and  can be found using the distance formula as follows:

This is the length of one side of the square, so the area is the square of this, or .

Example Question #19 : Squares

One of the vertices of a square is at the origin. The square has area 13. Which of the following could be the vertex of the square opposite that at the origin?

Possible Answers:

Correct answer:

Explanation:

Since a square is a rhombus, one way to calculate the area of a square is to take half the square of the length of a diagonal. If we let  be the length of each diagonal, then 

Therefore, we want to choose the point that is  units from the origin. Using the distance formula, we see that  is such a point:

 

Of the other points:

:

 

:

 

:

 

Example Question #16 : Squares

One of your holiday gifts is wrapped in a cube-shaped box. 

If one of the edges has a length of 6 inches, what is the area of one side of the box?

Possible Answers:

Correct answer:

Explanation:

One of your holiday gifts is wrapped in a cube-shaped box. 

If one of the edges has a length of 6 inches, what is the area of one side of the box?

We are asked to find the area of one side of a cube, in other words, the area of a square.

We can find the area of a square by squaring the length of the side.

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