Pre-Algebra : Perimeter of a Rectangle or Square

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #31 : Perimeter Of A Rectangle Or Square

A squares sides measure \(\displaystyle 8.1\) inches each.  What is its perimeter?

Possible Answers:

\(\displaystyle 34.4\) square inches

\(\displaystyle 30.4\) square inches

\(\displaystyle 32.3\) square inches

\(\displaystyle 32.4\) square inches

\(\displaystyle 32.2\) square inches

Correct answer:

\(\displaystyle 32.4\) square inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 32.4\) square inches

Example Question #32 : Perimeter Of A Rectangle Or Square

A squares sides measure \(\displaystyle 7.4\) inches each.  What is its perimeter?

Possible Answers:

\(\displaystyle 39.6\) square inches

\(\displaystyle 29.8\) square inches

\(\displaystyle 29.6\) square inches

\(\displaystyle 28.6\) square inches

\(\displaystyle 27.6\) square inches

Correct answer:

\(\displaystyle 29.6\) square inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 29.6\) square inches

Example Question #33 : Perimeter Of A Rectangle Or Square

A rectangle measures \(\displaystyle 3.1\) inches along its short side, and \(\displaystyle 3.3\) inches along its long side.  What is the perimeter of the rectangle?

 

Possible Answers:

\(\displaystyle 12.2\) square inches

\(\displaystyle 12.8\) square inches

\(\displaystyle 12.6\) square inches

\(\displaystyle 12.7\) square inches

\(\displaystyle 12.4\) square inches

Correct answer:

\(\displaystyle 12.8\) square inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 12.8\) square inches

Example Question #33 : Perimeter Of A Rectangle Or Square

A rectangle measures \(\displaystyle 1.2\) inches along its short side, and \(\displaystyle 4.8\) inches along its long side.  What is the perimeter of the rectangle?

Possible Answers:

\(\displaystyle 12.1\) inches

\(\displaystyle 12.2\) inches

\(\displaystyle 12\) inches

\(\displaystyle 11\) inches

\(\displaystyle 12.8\) inches

Correct answer:

\(\displaystyle 12\) inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 12\) inches

Example Question #313 : Geometry

A rectangle measures \(\displaystyle x\) inches along its short side, and \(\displaystyle y\) inches along its long side.  What is the perimeter of the rectangle?

Possible Answers:

\(\displaystyle 2x + y\) inches

\(\displaystyle 2 + 2y\) inches

\(\displaystyle 4x + 4y\) inches

\(\displaystyle 6x + 6y\) inches

\(\displaystyle 2x + 2y\) inches

Correct answer:

\(\displaystyle 2x + 2y\) inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 2x + 2y\) inches

Example Question #34 : Perimeter Of A Rectangle Or Square

A squares sides measure \(\displaystyle x+1\) inches each.  What is its perimeter?

Possible Answers:

\(\displaystyle 4x + 4\) inches

\(\displaystyle 4x + 8\) inches

\(\displaystyle 2x + 4\) inches

\(\displaystyle 8x + 4\) inches

\(\displaystyle 4x + 2\) inches

Correct answer:

\(\displaystyle 4x + 4\) inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 4x + 4\) inches

Example Question #35 : Perimeter Of A Rectangle Or Square

A squares sides measure \(\displaystyle x\) inches each.  What is its perimeter?

Possible Answers:

\(\displaystyle 2x\) inches

\(\displaystyle 4x\) inches

\(\displaystyle 8x\) inches

\(\displaystyle .4x\) inches

\(\displaystyle 16x\) inches

Correct answer:

\(\displaystyle 4x\) inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 4x\) inches

Example Question #316 : Geometry

A rectangle measures \(\displaystyle x\) inches along its short side, and \(\displaystyle 8\) inches along its long side.  What is the perimeter of the rectangle?

Possible Answers:

\(\displaystyle 2x + 16\) inches

\(\displaystyle 2x + 8\) inches

\(\displaystyle 4x + 32\) inches

\(\displaystyle 2x + 10\) inches

\(\displaystyle x + 16\) inches

Correct answer:

\(\displaystyle 2x + 16\) inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

\(\displaystyle 2x + 16\) inches

Example Question #53 : Perimeter

Find the perimeter of a rectangle with a length of 7cm and a width that is half the length.

Possible Answers:

\(\displaystyle 24.5\text{cm}\)

\(\displaystyle 21\text{cm}\)

\(\displaystyle 10.5\text{cm}\)

\(\displaystyle 24.5\text{cm}^2\)

\(\displaystyle 21\text{cm}^2\)

Correct answer:

\(\displaystyle 21\text{cm}\)

Explanation:

The formula to find the perimeter of a rectangle is

\(\displaystyle P = a + b + c + d\)

where a, b, c and d are the sides of the rectangle.  We know the length is 7cm and the width is half the length.  So, the width is 3.5cm.  So, we can substitute and get

\(\displaystyle P = 7\text{cm} + 7\text{cm} + 3.5\text{cm} + 3.5\text{cm}\)

\(\displaystyle P = 21\text{cm}\)

Note that when we add, we do not combine the labels, we only combine the numbers.

Example Question #35 : Perimeter Of A Rectangle Or Square

What is the perimeter of a rectangle with width of 4 meters and length that is triple its width?

Possible Answers:

\(\displaystyle 32m\)

\(\displaystyle 48m\)

\(\displaystyle 12m\)

\(\displaystyle 16m\)

Correct answer:

\(\displaystyle 32m\)

Explanation:

What is the perimeter of a rectangle with width of 4 meters and length that is triple its width?

First, let's find the dimensions of our rectangle.

Width is easy, it is given to us as 4 meters.

Length is a little trickier, it is triple the width:

 \(\displaystyle 4*3=12 meters\)

Next, we need to recognize that perimeter is the distance around the outside of our shape. 

Because we have a rectangle, we know that we have two 12 meter sides and two 4 meter sides.

So we do the following to get our answer:

\(\displaystyle 12+12+4+4=32m\)

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