How to find the perimeter of a pentagon - SSAT Upper Level Quantitative (Math)
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A pentagon with perimeter 54 has three congruent sides of length 
; its other two sides are congruent to each other. Give the length of each of those other two sides in terms of 
.
A pentagon with perimeter 54 has three congruent sides of length
The perimeter of a polygon is the sum of the lengths of its sides. If we let 
be the length of one of those other two sides, we can set up this equation and solve for 
:
The perimeter of a polygon is the sum of the lengths of its sides. If we let
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A regular pentagon has perimeter 7 meters. Give the length of one side in millimeters.
A regular pentagon has perimeter 7 meters. Give the length of one side in millimeters.
One meter is equal to 1,000 millimeters, so the perimeter of 7 meters can be expressed as:
7 meters = 
millimeters.
Since the five sides of a regular pentagon are congruent, divide by 5:
millimeters.
One meter is equal to 1,000 millimeters, so the perimeter of 7 meters can be expressed as:
7 meters =
Since the five sides of a regular pentagon are congruent, divide by 5:
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A regular pentagon has perimeter 42 meters. What is the length of one side in centimeters?
A regular pentagon has perimeter 42 meters. What is the length of one side in centimeters?
One meter is equal to 100 centimeters, so the perimeter of 42 meters can be expressed as follows:
meters 
centimeters
In a regular pentagon, all sides are equal in length. Divide the perimeter by 5 to get the length of each side:
centimeters
One meter is equal to 100 centimeters, so the perimeter of 42 meters can be expressed as follows:
In a regular pentagon, all sides are equal in length. Divide the perimeter by 5 to get the length of each side:
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The perimeter of a pentagon is 
. The pentagon has three congruent sides of length 
meters. Its other two sides are congruent to each other, each with a length of 
.
Find 
.
The perimeter of a pentagon is
Find
The perimeter of a polygon is sum of the lengths of its sides. In this pentagon, three sides have the same length of 4 and two others have the same length of 
. So we can write:
Now we should solve this equation for 
:
The perimeter of a polygon is sum of the lengths of its sides. In this pentagon, three sides have the same length of 4 and two others have the same length of
Now we should solve this equation for
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A pentagon with perimeter 40 meters has two congruent sides of length 
. Its other three sides are congruent to each other. Give the length of each of the other three sides in terms of 
.
A pentagon with perimeter 40 meters has two congruent sides of length
The perimeter of a polygon is the sum of the lengths of its sides. Let:
length of one of those other three sides
Now we have:
So the length of each of those other three sides is 
The perimeter of a polygon is the sum of the lengths of its sides. Let:
Now we have:
So the length of each of those other three sides is
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Two sides of a pentagon have a length of 
, and three other sides have the length of 
. Give the perimeter of the pentagon in terms of 
.
Two sides of a pentagon have a length of
The perimeter of a polygon is the sum of the lengths of its sides. So we can write:
The perimeter of a polygon is the sum of the lengths of its sides. So we can write:
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Each exterior angle of a pentagon is 72 degrees and the length of one side is 4 meters. Give the perimeter of the pentagon.
Each exterior angle of a pentagon is 72 degrees and the length of one side is 4 meters. Give the perimeter of the pentagon.
As each exterior angle of the pentagon is 72 degrees, each interior angle would be
That means all of the interior angles of the pentagon are identical, so we have a regular pentagon.
The perimeter of a polygon is the sum of the lengths of its sides. So the perimeter of a regular pentagon is 
; where 
is the length of a side.
So we get:
meters
As each exterior angle of the pentagon is 72 degrees, each interior angle would be
That means all of the interior angles of the pentagon are identical, so we have a regular pentagon.
The perimeter of a polygon is the sum of the lengths of its sides. So the perimeter of a regular pentagon is
So we get:
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A pentagon has four congruent sides of length 
. The length of the fifth side is 
meters.
Give the perimeter of the pentagon.
A pentagon has four congruent sides of length
Give the perimeter of the pentagon.
The perimeter of a polygon is the sum of the lengths of its sides. So we can write:
The perimeter of a polygon is the sum of the lengths of its sides. So we can write:
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