# How to Calculate the Area of a Rhombus

A rhombus, also known as a diamond shape, is a type of quadrilateral with opposite sides parallel and all four sides are equal in length. While the area of many other shapes like rectangles can be easily calculated using simple multiplication, calculating the area of a rhombus requires a different approach. In this article, we will walk you through the steps to calculate the area of a rhombus.

**Three Methods to Calculate the Area of a Rhombus**

**1. Using Diagonals**

The area of a rhombus can be calculated if you know the length of its two diagonals (d1 and d2) using the following formula:

Area = (d1 * d2) / 2

Here’s how to do it:

a. Measure the length of both diagonals.

b. Multiply the lengths.

c. Divide the product by 2.

d. The result is the area of the rhombus.

Example: If we have a rhombus with diagonals measuring 10 cm and 8 cm, its area would be (10 * 8) / 2 = 40 square centimeters.

**2. Using Base and Height**

Another way to calculate the area of a rhombus is by knowing its base (b) and height (h). The formula in this case is:

Area = b * h

Here’s how to do it:

a. Measure the length of one side, which represents the base.

b. Next, measure the distance between opposite vertices that create an orthogonal axis or altitude to that side.

c. Multiply base with height.

d. The result is the area of the rhombus.

Example: If we have a rhombus with base measuring 5 cm and height measuring 4 cm, its area would be 5*4 = 20 square centimeters.

**3. Using Trigonometry**

If you know the length of one side (a) and one internal angle of the rhombus (θ), you can calculate its area using trigonometry. The formula is as follows:

Area = a² * sin(θ)

Here’s how to do it:

a. Measure the length of one side.

b. Measure the internal angle between two adjacent sides.

c. Convert angle into radians if necessary.

d. Calculate sine function of the angle.

e. Multiply the side length squared with sine value.

f. The result is the area of the rhombus.

Example: If we have a rhombus where sides measure 5 cm each and one internal angle measures 60 degrees, its area would be 5² * sin(60°) = 25 * √3/2 ≈ 21.65 square centimeters.

**Conclusion**

There are various methods to calculate the area of a rhombus, each requiring specific measurements such as diagonals, base and height, or side length and internal angle. Regardless of which method you choose, understanding these formulas and steps will help you quickly and accurately find the area of any rhombus.