How to find perimeter
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ISEE Middle Level Quantitative Reasoning › How to find perimeter
What is the perimeter of a square with area 196 square inches?
It cannot be determined from the information given.
Explanation
A square with area 196 square inches has sidelength 
What is the length of a rectangular room with a perimeter of 
Explanation
We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.
Subtract 
Divide 
Angela has a garden that she wants to put a fence around. How much fencing will she need if her garden is 
Explanation
The fence is going around the garden, so this is a perimeter problem.
Each side of a square is 
(A)
(B) The perimeter of the square
(A) and (B) are equal
(A) is greater
(B) is greater
It is impossible to determine which is greater from the information given
Explanation
The perimeter of a square is four times its side length:
Since the perimeter is equal to 
What is the length of a rectangular room with a perimeter of 
Explanation
We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.
Subtract 
Divide 
What is the length of a yard with a perimeter of 
Explanation
We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.
Subtract 
Divide
David wants to put a fence around his backyard. How much fencing will he need if his backyard is 
Explanation
The fence is going around the backyard, so this is a perimeter problem.
What is the length of a yard with a perimeter of 
Explanation
We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.
Subtract 
Divide
What is the length of a rectangular room with a perimeter of 
Explanation
We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.
Subtract 
Divide 
Which is the greater quantity?
(a) The perimeter of an equilateral triangle with sidelength 30 inches
(b) The perimeter of a square with sidelength 2 feet
(b) is greater
(a) is greater
(a) and (b) are equal
It is impossible to tell from the information given
Explanation
Each figure has sides that are congruent, so in each case, multiply the sidelength by the number of sides.
(a) The triangle has perimeter 
(b) 2 feet are equal to 24 inches, so the square has sidelength 
The square has the greater perimeter.