Pre-Algebra - Perimeter of a Rectangle or Square

A squares sides measure inches each. What is its perimeter?

square inches

Explanation

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

square inches

A rectangle measures inches along its short side, and inches along its long side. What is the perimeter of the rectangle?

inches

Explanation

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

inches

If the diagonal of a square is $6\sqrt2$ , what is the perimeter?

$24\sqrt2$

$48\sqrt2$

Explanation

Write the formula to obtain the side given the diagonal for squares.

$s=\frac{d}{\sqrt2} = \frac{6\sqrt2}{\sqrt2} =6$

The perimeter of the square is four times the side.

The answer is .

A rectangle measures inches along its short side, and inches along its long side. What is the perimeter of the rectangle?

square inches

Explanation

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

square inches

A squares sides measure inches each. What is its perimeter?

inches

Explanation

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

inches

A rectangle measures ten inches along its short side, and twelve inches along its long side. What is the perimeter of the rectangle?

fourty four inches

fourty five inches

fourty six inches

twenty four inches

thirty four inches

Explanation

To find the perimeter of any object, simply add the length of each side together.

The best answer is:

$\P=2s_1+2s_2\=2(10)+2(12)\=20+24\=44$

fourty four inches

Find the perimeter of a square with a side of length 12cm.

$48\text{cm}$

$144\text{cm}^2$

$48\text{cm}^2$

$144\text{cm}$

$12\text{cm}^4$

Explanation

To find the perimeter of a square, we use the following formula

where a, b, c, and d are the lengths of the sides. In this case, a side of the square is 12cm. We know that the sides of a square are all equal. So,

$P = 12\text{cm} +12\text{cm} +12\text{cm} +12\text{cm}$

$P = 48\text{cm}$

Note that when adding, we do not change the label, only the coefficients.

Therefore, the perimeter of the square with a side of length 12cm is 48cm.

A rectangle measures inches along its short side, and inches along its long side. What is the perimeter of the rectangle?

feet

Explanation

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

feet

A squares sides measure inches each. What is its perimeter?

square inches

Explanation

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

square inches

Sarah has a purple square rug in the middle of her bedroom. The area of rug is . What is the length of each side of rug?

Explanation

The correct answer to the question is .

The formula for the perimeter of a square is times the length of a side. We know this because all sides of a square are equal to one another.

Our unknown number is the length of each side which we set to . In this scenario, we know that the equation is .

In order to solve for , we divide each side of the equation by :

$\frac{4x}{4} = \frac{16}{4}$

Therefore, is by itself on the left side of the equation. We know that .

In this equation, . Therefore, the length of a side of Sarah's rug is .

Perimeter of a Rectangle or Square

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