# Diagonal of a Rectangle Calculator

A Rectangle is a quadrilateral in which all the four angles are 90^{o}, the opposite sides are parallel and equal in lengths

## What Is Diagonal of a Rectangle Calculator?

A Rectangle is a quadrilateral in which all the four angles are 90^{o}, the opposite sides are parallel and equal in lengths, the two diagonals are of equal lengths and intersect each other in the middle.

Cuemath's online diagonal of a rectangle calculator allows you to find the length of the diagonal of a rectangle.

## How to Use the Diagonal of a Rectangle Calculator?

Please follow the steps given below to find the length of the diagonal of a rectangle.

**Step 1:**Enter the length of the rectangle.**Step 2:**Enter the width of the rectangle.**Step 3:**Click on "Calculate" to find the length of the diagonal of the rectangle.**Step 4:**Click on "Reset" to find the length of the diagonal of the rectangle for different sets of length and width.

## What is Diagonal of a Rectangle?

A diagonal cuts a rectangle into 2 right triangles. In which the sides equal to the sides of the rectangle and with a hypotenuse. That hypotenuse is diagonal.

The length of the diagonal of the Rectangle is found using the following formula :

**Diagonal of Rectangle = √(l² + w²) **

Here, **"l"** stands for Length of the rectangle and **"w"** stands for the width of the rectangle.

The diagonal of a rectangle calculator uses the same formula to calculate the length of the diagonal of the rectangle.

**Solved Example :**

Find the length of the diagonal of a rectangle whose length is 4 units and width is 3 units.

**Solution :**

Length of the Rectangle = 4 units

Width of the Rectangle = 3 units

Substituting the values of length and width in the formula, we get,

Diagonal = √(l² + w²)

= √(4² + 3²)

= √(25²).

= 5 units.

∴ Length of the diagonal of the rectangle = 5 units.

Now use the calculator to find the length of the diagonal for the following rectangles with

- Length = 8 units Width = 6 units
- Length = 6 units Width = 8 units