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

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.

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.

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.

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).

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.

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.

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.

You can't with just that information.

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

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.

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.

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

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

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

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).

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.

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.

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

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.

The area needs to be given then. If the area is not given and the width is not given, you can't solve the problem.

Without knowing the width, getting the area isnt possible. However, if you have the length of the diagonal and the height, you can use trigonometry to solve for your width but that can be confusing and multi-stepped for most.

You might use the grid method where you have to count the number of grid squares inside the square.

No. Area of a Rectangle = Length x Width. You would multiply the length and width and that would be in square units.

You can't. When we consider the width, length and area of a rectangle, we must know any two of those measurements in order to find the third.

You can't. That's because with a given area, there are many length/width combinations that could multiply together to get that area. For example, if the area is given as 20 square units, the possible length/width combinations include: 1x20, 2x10, 4x5, 5x4, 10x2 and 20x1. That doesn't even include the almost infinite number of lengths and widths that aren't whole numbers, such as 5.5 x 3.636. The point is: if you're given the area of a rectangle, you have to know the length in order to find the width, or you have to know the width in order to find the length.