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Example Questions
Example Question #61 : Quadrilaterals
Find the perimeter of a rectangle given length 7 and width 2.
To solve, simply use the formula for the perimeter of a rectangle. Thus,
If the formula escapes you, simply draw a picture and add all of the sides together. Rememeber, a rectangle has 4 sides, two are equal and the other 2 are equal.
Example Question #52 : How To Find The Perimeter Of A Rectangle
A rectangle has an area of . The rectangle's sides have values of
cm and
cm. What is the perimeter of the rectangle?
First, we must solve for . The formula for the area of a rectangle is
. Because we know the area is
, and the length and width are
and
, we can plug these in to solve for
, as follows:
Since we know that , we can use this to solve for the sides of the rectangle:
and
We can now use these values to solve for the rectangle's perimeter:
Therefore, the perimeter of the rectangle is .
Example Question #52 : How To Find The Perimeter Of A Rectangle
A rectangle has an area of . What is the perimeter of the rectangle?
Not enough information is given.
Not enough information is given.
Not enough information is given to solve this problem. While is a possible answer (assuming all of the sides of the rectangle are
), because it is a rectangle, you cannot assume that all of the sides are the same. Because
is not a prime number, there is more than one combination of numbers that could work out to equal an area of
.
Example Question #62 : Quadrilaterals
Horton's Tile and Fixtures cuts Spanish tile in a rectangular shape that is wide and has an area of
. What would be the perimeter of a cut Spanish tile?
Since we know the width and area, we can determine the length by using the equation for area of a rectangle:
Now that we know the length of the tile, we can solve for perimeter:
Example Question #62 : Rectangles
If the length of a rectangle is 2 inches longer than the width, and the width is , what is the perimeter of the rectangle?
First we need to know that the square root of 4 is 2, we can know this because because if we work backwards we see that 2 x 2= 4, so we know the width of the rectangle is 2.
Since the length is 2 more than the width, we add 2 + 2 and get a length of 4 inches.
Now we can draw the rectangle and label each width (short side) with a measure of 2 inches and each length (long side) with a measure of 4 inches.
Now all we need to do is add up all the sides, so we have 2 + 2 + 4 + 4 which equals 12.
Since we are adding, and the measurements are in inches, our answer is .
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