# Rhombus Side Calculator: Find the Unknown Side of a Rhombus

## Side

## Rhombus

## Rhombus side calculator

If you need to find the length of one of the sides of a rhombus, our free online rhombus side calculator can help. Diagonals of a rhombus are mutually perpendicular, and form the same right triangles. The side of the rhombus is hypotenuse in such a triangle, and half of the diagonals are legs. Using the Pythagorean theorem, we can find the side of the rhombus.

## Rhombus Side Formula

There is a formula that you can use to calculate the length of a side of a rhombus. The formula is based on the Pythagorean theorem:

a = \dfrac{\sqrt{d_1^2 + d_2^2}}{2}

where a is the length of the unknown side, and d₁ and d₂ are the lengths of the two diagonals of the rhombus.

## Example Problem

Here is an example of how to use the formula to find the length of a side of a rhombus.

### Example

Find the length of side a in a rhombus where d₁ = 5 and d₂ = 7.

We can use the formula to solve for a:

a = \dfrac{\sqrt{5^2 + 7^2}}{2}

a = \dfrac{\sqrt{74}}{2}

a ≈ 4.3

Therefore, the length of side a is approximately 4.3 units.

Use our free online calculator to find the length of the unknown side of a rhombus. Simply enter the lengths of diagonals, and our calculator will use the Pythagorean theorem to find the length of the unknown side.

Using our calculator can save you time and prevent calculation errors. Try it out today!

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