Last updated on August 30, 2025
A rhombus is a 2-dimensional quadrilateral with all sides having equal length. The surface area of a rhombus refers to the total area enclosed by its boundaries. In this article, we will learn about the surface area of a rhombus.
The surface area of a rhombus is the total area enclosed within its four sides. It is measured in square units.
A rhombus is a type of polygon that is essentially a parallelogram with equal-length sides.
It can be thought of as a "tilted square.
" The opposite angles of a rhombus are equal, and the diagonals intersect at right angles.
There are two primary methods to calculate the surface area of a rhombus, depending on the known dimensions.
The surface area of a rhombus can be calculated using different formulas depending on the given parameters.
The common formulas involve the lengths of the diagonals or the base and height of the rhombus.
Below are the formulas for calculating the surface area of a rhombus:
The area of a rhombus can be calculated using its diagonals. If the lengths of the diagonals are known, the formula to calculate the surface area is:
Surface Area = (d1 × d2) / 2 square units
Here, d1 and d2 are the lengths of the diagonals of the rhombus.
If the base and the perpendicular height of a rhombus are known, the surface area can be calculated using the following formula:
Surface Area = base × height square units
Where the base is the length of one side of the rhombus and the height is the perpendicular distance between two opposite sides.
The perimeter of a rhombus is the total length of its outer boundary, which is simply four times the length of one side. The formula for calculating the perimeter is: Perimeter = 4 × side length
Students sometimes confuse the diagonal lengths with the side lengths. Always remember that the diagonal is the line connecting two opposite corners, while the side is the length of the rhombus's boundary.
Using the formula: Surface Area = (d1 × d2) / 2 = (10 × 8) / 2 = 80 / 2 = 40 cm²
Find the surface area of a rhombus with a base of 12 cm and a height of 7 cm.
Surface Area = 84 cm²
Using the formula: Surface Area = base × height = 12 × 7 = 84 cm²
The diagonals of a rhombus are 16 cm and 12 cm. Find the surface area.
Surface Area = 96 cm²
Using the formula: Surface Area = (d1 × d2) / 2 = (16 × 12) / 2 = 192 / 2 = 96 cm²
A rhombus has a side length of 10 cm and a height of 8 cm. Find the surface area.
Surface Area = 80 cm²
Using the formula: Surface Area = base × height = 10 × 8 = 80 cm²
If a rhombus has diagonals measuring 14 cm and 9 cm, what is its surface area?
Surface Area = 63 cm²
Students often make mistakes while calculating the surface area of a rhombus, which leads to wrong answers. Below are some common mistakes and the ways to avoid them.
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