# Diagonal of a Rectangle Calculator

Free online Diagonal of a rectangle calculator – Enter the length and width of the rectangle with different length units then click calculate button.

 Diagonal of a Rectangle

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## The diagonal of a rectangle

A rectangle with sides of length a and b has a diagonal that is the longest distance from a corner to a non-corner point on a plane. The same is true for a parallelogram with the only difference being that this diagonal is not necessarily a line. A diagonal is a measure from a vertex to the opposite side, passing through the opposite corner. The diagonal of a rectangle is twice its width, and the diagonal of a parallelogram is the same as the height. The diagonal of a square is a maximum of one-half of its side length.

## Diagonal of Rectangle formula:-

• Diagonal of a rectangle = √(a²+b²)
• a → Length of rectangle
• b → Breadth of a rectangle

## How to solve the diagonal of a rectangle problem.

Example.1:-Length of the rectangle is 30 metres and the breadth is 40 metres then find the diagonal of the rectangle.

Diagonal of a rectangle = √(length² + breadth²) = √(40² + 30²) = 50 metres

Example.2:-Length of the rectangle is 20 metres and the breadth is 70 metres then find the diagonal of the rectangle.

Diagonal of a rectangle = √(length² + breadth²) = √(20² + 70²) = 72.801 metres

## How to use this Diagonal rectangle calculator

One of the most common geometry questions people face is to calculate the diagonal of a rectangle. It’s actually quite easy to calculate the diagonal of a rectangle using a simple formula. All you need to do is put in the length and breadth of the rectangle and click on the button and you’ll see the answer immediately.