The area of a rectangle, one side of which is 4 cm, is equal to 36 cm2, find its perimeter.
July 26, 2021
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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