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The diagonal calculator measures the diagonal, area, perimeter, and diagonal angle of a rectangle. You just need to enter only two values to find the diagonal of the rectangle.
**Diagonal of a Rectangle:**

A Rectangle is a quadrilateral having four angles and all the angles are 90 degrees. The opposite sides of the rectangle are parallel and equal in length. The adjacent sides of the rectangle are different in length, but the diagonals are equal in length and intersect in the middle point of the rectangle. We need to enter the length and width in the rectangle diagonal calculator to find the diagonal of the rectangle.
**How to Find the Diagonal of a Rectangle?**

We can find diagonal of a rectangle as:
**Diagonal = √(l² + w²) **
**Where:**
**I = Length of the Rectangle**
**W = Width of Rectangle**
**Area of a Rectangle:**

We can find the Area of the Rectangle by multiplying the length and width:
Area = l× w
**The Perimeter of a Rectangle:**

The perimeter of the rectangle can be measured by the given formula:
Perimeter = 2l + 2w=2(l+w)
**Possibilities of Diagonal of Rectangle Measurements:**

We can encounter various possibilities to find diagonal of a rectangle.
**From Area and Length:**

First, we have to find the length by the given formula:
l= A /w
Then,
P = 2l + 2w
Diagonal length of a rectangle = √(l² + w²)
**From Area and Width:**

First, we have to find the width:
w= A / l
P = 2l + 2w
The diagonal measurement of a rectangle can be done as:
Diagonal = √(l² + w²)
**From Perimeter and Length:**

w = (P - 2l) / 2
Area = l× w
Diagonal = √(l² + w²)
**From Perimeter and Width:**

l= (P - 2w) / 2
Area = l× w
Diagonal = √(l² + w²)
**Practical Example:**

Measure the length of the diagonal, area, and perimeter of a rectangle whose length is 4 units and width is 3 units.
**Sol:**
Length = 4 units
Width = 3 units
Substituting the values in the below equation
** Diagonal = √(l² + w²)= √(4² + 3²) = √(25²).**
The rectangle diameter = 5 units.
Length of diagonal of a rectangle= 5 units.
Area of rectangle = l× w
Area of rectangle = 4× 3 = 12 unit**²**
Perimeter of the rectangle = 2l + 2w
Perimeter of the rectangle = 2(4) + 2(3)
The perimeter of the rectangle = 8+ 6
The perimeter of the rectangle = 14 units
**How to Use a Diagonal Calculator?**

Stick to the following steps for precise calculations by the diagonal measurement calculator
**Input:**
Enter any two of the given input and Hit the calculate button
**Output:**
**References:**

From the source of wikipedia.org: Circumscribed circles>,Triangles
From the source of wikihow.com: Diagonal,Length, and the Width

- The diagonal of a rectangle
- The Area of a rectangle
- The Perimeter of a rectangle
- The circumcircle of a rectangle
- The angle of a rectangle

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