Pre-Algebra : Perimeter
Study concepts, example questions & explanations for Pre-Algebra
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Example Questions
Example Question #33 : Perimeter Of A Rectangle Or Square
A rectangle measures 
To find the perimeter of any object, simply add the length of each side together. The best answer is:
Example Question #34 : Perimeter Of A Rectangle Or Square
A rectangle measures 
To find the perimeter of any object, simply add the length of each side together. The best answer is:
Example Question #51 : Perimeter
A squares sides measure 
To find the perimeter of any object, simply add the length of each side together. The best answer is:
Example Question #52 : Perimeter
A squares sides measure 
To find the perimeter of any object, simply add the length of each side together. The best answer is:
Example Question #37 : Perimeter Of A Rectangle Or Square
A rectangle measures 
To find the perimeter of any object, simply add the length of each side together. The best answer is:
Example Question #38 : Perimeter Of A Rectangle Or Square
Find the perimeter of a rectangle with a length of 7cm and a width that is half the length.
The formula to find the perimeter of a rectangle is
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
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?
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:
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:
Example Question #41 : Perimeter Of A Rectangle Or Square
What is the perimeter of a square, if the square's area is 64 light years?
What is the perimeter of a square, if the square's area is 64 light years?
To find the perimeter of a square, we need to find the length of the side.
Note that squares have 4 equal sides, so we can work backward from our area to find the side length:
However, we are not quite done. We still need to find the perimeter.
So the square is 32 light years in perimeter.
Example Question #42 : Perimeter Of A Rectangle Or Square
You want to build a fence around your yard. Your yard is a perfect square with one side having a length of 11 ft. How many feet of fencing do you need to surround your entire yard?
The formula to find the perimeter of a square or rectangle is
where a, b, c, and d are the lengths of the sides. We know that the yard is a perfect square, meaning all sides are equal. We also know one side is 11 ft. Using that information, we can substitute
Therefore, we need 44 ft of fencing to use on our entire yard.
Example Question #43 : Perimeter Of A Rectangle Or Square
John is a farmer he needs to create a pig pen to keep his pigs in. He only needs three sides of the fence because on side is his barn. One side of the fence needs to be 
One side of the fence is 
This is a perimeter problem so you need to add the three numbers together.
So:
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