The area of a rectangle, one side of which is 4 cm, is equal to 36 cm2, find its perimeter.
July 26, 2021 | education
| Find the length of the second side of this rectangle.
Let us denote it by x.
According to the condition of the problem, one side of this rectangle is 4 cm, and the area of this rectangle is 36 cm².
Since the area of any rectangle is equal to the product of the length and width of this rectangle, we can write the following equation:
x * 4 = 36.
We solve the resulting equation:
x = 36/4;
x = 9 cm.
Find the perimeter p of a given rectangle as the doubled sum of the length and width of this rectangle:
p = 2 * (9 + 4) = 2 * 13 = 26 cm.
Answer: the perimeter of this rectangle is 26 cm.
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