Q&A for How to Calculate the Area of a Rectangle

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How do I find the area in meters?

Community Answer

You cannot find an area in meters, because area is expressed in square meters. If the values of your rectangle sides are not in meters, then you must first convert those units to meters, and then multiply the converted values to get the area in square meters.

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If the problem says length is 105 breadth is 81 and other said of length is 103 and breadth is 53, how do I find the area of the rectangle?

Community Answer

A rectangle has 2 sides of equal length and 2 sides of equal width (breadth). By definition, the object in which you are describing is not a rectangle. The object you have is an irregular quadrilateral.

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How do I find the area of a rectangle when each side is a different length?

Community Answer

It is not a rectangle if each side is a different length. It is either an irregular shape or a trapezoid. There is no formula for finding the area of an irregular shape. The area of a trapezoid is found by multiplying its height by the average of its bases.

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Question

How can I find the area of a rectangle with only one number?

Community Answer

If both the sides are labeled with that same number, then it is a square. Square the number to get the area. If it's not a square, you can't, unless there's more information available than you're letting on (like an equation to calculate the length of the other side).

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How can I find the area of a rectangle if I only know the diagonal?

Community Answer

The area of a rectangle is calculated by multiplying its width times its length. You'll need this info, not the diagonal, to solve the problem.

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Question

How can I find the length of a rectangle if given only the area and width?

Community Answer

The area of a rectangle is equal to its length multiplied by its width. This equation is represented by A=L*W. If you have only the area and width, you can use the same equation to solve for the area. For example, if the area is 60 and the width is 5, your equation will look like this: 60 = x*5. Divide 60 by 5 to find x, or the length. The answer here is 12.

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Question

How do I calculate the area of an irregular rectangle?

Onebluethinker

Community Answer

There is no such thing as an irregular rectangle. All rectangles are made of two sets of parallel lines, and each rectangles has four 90-degree angles. The area is calculated by multiplying the length of the rectangle by its width.

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Question

If I am only given the diagonal of a rectangle how can I find the area?.

Community Answer

You can't with just that information.

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Question

How do I find the area of a quadrilateral?

Donagan

Top Answerer

There is no area formula for a non-specific quadrilateral. There are commonly available area formulas for a square, rectangle, parallelogram, rhombus, and trapezoid.

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Question

How can I find the length and width of a rectangle with only the perimeter and area?

Donagan

Top Answerer

This is a "two equations in two unknowns" situation. Write two equations, one for the area and one for the perimeter, both in terms of length and width. Solve either equation for one of the unknowns. Plug that value back into either equation, which will give you the value of the other unknown.

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If the length is twice the width and the area is 50^2, how do I set up the equation?

Community Answer

Since the area of a rectangle equals length times width, A=LW, A=50^2=2500, L=2W. So, 2500=(L)(W), 2500=(2W)(W) and 2500=2W^2.

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If the diagonal is 50 cm and the length is 48 cm, what is the area?

Donagan

Top Answerer

By the Pythagorean theorem, 50² - 48² = 196. The width is √196 = 14 cm. The area is (48)(14) = 672 square centimeters.

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Question

How do I find half of an area instead of a whole area?

Donagan

Top Answerer

If the area is rectangular, multiply the length by half the width, or multiply the width by half the length.

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Area is 45 square feet. The length is 9. What is the perimeter?

Donagan

Top Answerer

The length is 9. The width is 45/9 = 5. The perimeter is (2)(9) + (2)(5).

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Can I find the area by the diagonals of the rectangle?

Donagan

Top Answerer

No. A given diagonal can correspond to many different length/width combinations and thus many different possible areas. In addition to knowing the diagonal(s), you would also have to know either the length or the width of the rectangle in order to find the other dimension (and thus the area).

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How do I find the length and width if the area is given?

Donagan

Top Answerer

It can't be done. A given area can correspond to many different length/width combinations. For example, a rectangle with an area of 400 square units could have a length of 100 and a width of 4, a length of 50 and a width of 8, or a length of 25 and a width of 16.

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Question

The length of rectangle is 8 meters more than twice its width. The perimeter is 112 meters. Find its area.

Donagan

Top Answerer

Let w be the width. Then the length is (2w + 8). The perimeter is 112 = 2w + 2(2w + 8) = 2w + 4w + 16 = 6w + 16 = 112. Then 6w = 96, and the width w = 6. So the length is (2)(6) + 8 = 20. The area is (6)(20) = 120 sq m.

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Question

How can i calculate the area of a rectangle with only diameter and height?

CageyCat

Top Answerer

Diameter refers to a circle. For a rectangle, you need the width and length.

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Question

I have one big rectangle with inside split into other 4 rectangle shapes. The area of first 3 rectangles are given. How to find the area of 4th rectangle?

Community Answer

Subtract the sum of the area of the 3 rectangles you know from the area of the big rectangle. The answer is the area of the fourth.

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