Rhombus is a 2D shape which has four equal sides and four angles which are NOT necessarily 90 degrees. A rhombus is often called a diamond or diamond-shaped object. The total distance traveled along the border of a rhombus is called the perimeter of a rhombus. We can also call a square a rhombus because it satisfies all the conditions that a rhombus has.

Rhombus is that

All four of its sides are of equal length.
Opposite sides must be parallel.
The altitude of a triangle is defined as a distance at right angles between two parallel sides.
Diagonals of a rhombus, cut each other into two equal parts at 90 degrees.

The formula to calculate the perimeter of a rhombus is as follows:

Perimeter=4×a

Where, a=length of one side of the rhombus.

A rhombus is one type of polygon that has all four sides equal in lengths. Hence, the perimeter can be obtained by multiplying the length of one side by 4.

Solved Example

Example 1: Calculate the perimeter of a rhombus with a side length of 5 cm.

Solution:

Identify the length of one side:

a=5 cm

Use the perimeter formula:

Perimeter=4×a

=4×5 cm

=20 cm

The perimeter of the rhombus is thus 20 cm.

Example 2: Find the perimeter of a rhombus where the length of the side is 7 cm.

Solution:

Find the length of one side:

a=7 cm

Use the perimeter formula:

Perimeter=4×a

=4×7 cm

=28 cm

So the perimeter of the rhombus is 28 cm.

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