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The perimeter is 7 cm
The perimeter of a rhombus is the sum of its 4 sides
To find the area of a rectangle, you multiply its length by its width. Given the area of 20 cm², we need to find two numbers that multiply to 20. The possible dimensions are 4 cm by 5 cm or 2 cm by 10 cm. To find the perimeter of a rectangle, you add up all its sides. With a perimeter of 18 cm, the possible dimensions are 4 cm by 5 cm, as 4 + 5 + 4 + 5 = 18 cm.
If it has 2 opposite parallel sides of 10 cm and 2 opposite parallel sides of 5 cm then its perimeter is the sum of the 4 sides which is 30 cm
Perimeter = 5*5 = 25 cm