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How to find the primeter of a rectangle when the area and lenthh is given?
Wiki User
∙ 15y ago
Okay, this will take some thinking, especially since I do not know your figures that are already given. Okay lets let X = the perimeter since that is what we need to know. Now lets say that the length is 8 and the area is 56. Now we need to find the width to be able to find the perimeter. So, since we know that in order to find area use the formula for area of a rectangle which is length multiplied by width. So since we don't know the width we will have to work backwards by dividing the area by the length. ( L times W = A). So we will divide A by L to get W. If we did 56 divided by 8, we get 7. So now we know that the width is 8. You can check your work by plugging the numbers in. L times W = A . We said that L =8, W =7 and A= 54. Which works out because 8 times 7= 56. So now we have to find the perimeter. The formula for finding the perimeter of a rectangle is 2 times L + 2 times W = P. So we know that the length is 8 and the width is 7 right? So now we can dot he easy part. 8 times 2 + 7 times 2 = perimeter. That equals, 16 + 14. So the perimeter equals 30.
Wiki User
∙ 15y ago
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80 feet
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A rectangle has primeter 20mexpress the area of the rectangle as a function of the length of one of its side?
If the perimiter is 20 and one side is [[length]] then the other side is (10 - [[length]]). So the area is: [[length]] x (10 - [[length]]) square metres.
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Divide the area by the length of the rectangle
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Divide its area by a given side
How do you find the length of a rectangle given the width and area?
the area of a rectangle = length x widthwe can rearrange this to give uslength of a rectangle = area/ width
What the area of the rectangle when the width is 4 inches?
That would depend on the length of the rectangle which has not been given but the area of a rectangle is length times width
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Area=b•h
What is the ratio of the area of a rhombus to the area of a rectangle?
Not enough information given
What is the area of rectangle that is 3cm by 12cm by 11cm by 2cm?
A rectangle can have only 2 dimensions and so finding the area from the given 4 dimensions has many possibilities.
What is area of rectangle when breadth and width are given?
The breadth of a rectangle is the height.
How do you find the area of rectangle given its perimeter?
You cannot.
