ISEE Lower Level Math : Rectangles

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

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Example Questions

Example Question #111 : Plane Geometry

Find the perimeter of a rectangle with a length of 7cm and a width of 4cm.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and are the lengths of the sides of the rectangle.

 

Now, we know the length of the rectangle is 7cm. Because it is a rectangle, we know the opposite side is also 7cm.  We also know the width of the rectangle iis 4cm.  Because it is a rectangle, the opposite side is also 4cm.  Knowing this, we can substitute into the formula.

Example Question #131 : Geometry

Find the perimeter of a rectangle with a length of 7cm and a width of 3cm.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, we know the length of the rectangle is 7cm.  Because it is a rectangle, we know the opposite side is also 7cm.  We know the width of the rectangle is 3cm.  Because it is a rectangle, we know the opposite side is also 3cm.  Knowing all of this, we can substitute into the formula.  We get

Example Question #32 : How To Find The Perimeter Of A Rectangle

Use the following figure to answer the question:

Rectangle1

Find the perimeter.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle. 

 

Now, in the rectangle

Rectangle1

we can see the length is 6 inches.  Because it is a rectangle, we know the opposite side is also 6 inches.

We can also see the width is 3 inches.  Because it is a rectangle, we know the opposite side is also 3 inches.

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

Example Question #41 : How To Find The Perimeter Of A Rectangle

Find the perimeter of a rectangle with a length of 8cm and a width of 6cm.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, we know the length of the rectangle is 8cm.  Because it is a rectangle, we know the opposite side is also 8cm.  

We know the width of the rectangle is 6cm.  Because it is a rectangle, we know the opposite side is also 6cm.

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

Example Question #111 : Plane Geometry

Use the following rectangle to answer the question:

Rectangle2

Find the perimeter.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, given the rectangle

Rectangle2

we can see the length is 11in.  Because it is a rectangle, the opposite side is also 11in.  We see the width is 5in.  Because it is a rectangle, the opposite side is also 5in.  

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

Example Question #101 : Rectangles

Find the perimeter of a rectangle with a length of 9in and a width of 4in

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

So, we know the length of the rectangle is 9in.  Because it is a rectangle, the opposite side is also 9in.  We know the width of the rectangle is 4in.  Because it is a rectangle, we know the opposite side is also 4in. 

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

Example Question #131 : Geometry

Use the following rectangle to answer the question:

Rectangle2

Find the perimeter.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, let's look at the rectangle.

Rectangle2

We can see the length is 11 inches.  Because it is a rectangle, the opposite side is also 11 inches.  We can see the width is 5 inches.  Because it is a rectangle, the opposite side is also 5 inches.

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

Example Question #137 : Geometry

Find the perimeter of a rectangle with a width of 5cm and a length that is two times the width.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c and d are the lengths of the sides of the rectangle.

 

Now, we know the width of the rectangle is 5cm.  Because it is a rectangle, the opposite side is also 5cm.  We also know the length is two times the width.  Therefore, the length is 10cm.  Because it is a rectangle, the opposite side is also 10cm. 

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

Example Question #41 : How To Find The Perimeter Of A Rectangle

Use the following rectangle to answer the question.

Rectangle4

Find the perimeter.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following formula:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, given the rectangle

Rectangle4

We can see the length is 9cm.  Because it is a rectangle, the opposite side is also 9cm. 

We can see the width is 7cm.  Because it is a rectangle, the opposite side is also 7cm.  

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

Example Question #121 : Plane Geometry

Use the following rectangle to answer the question:

Rectangle2

Find the perimeter.

Possible Answers:

Correct answer:

Explanation:

To find the perimeter of a rectangle, we will use the following equation:

where a, b, c, and d are the lengths of the sides of the rectangle.

 

Now, given the rectangle

Rectangle2

we can see the length is 11in.  Because it is a rectangle, the opposite side is also 11in.  

We can see the width of the rectangle is 5in.  Because it is a rectangle, the opposite side is also 5in.

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

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