a rectangle has an area of 360 square .what .it is 20 centimeters long.what is its perimeter
To find the perimeter of a rectangle, we need to know the lengths of its sides. In this case, we have been given the length of one side, which is 20 centimeters.
Since the area of the rectangle is given as 360 square units, and the length of one side is 20 centimeters, we can use this information to find the length of the other side.
The formula for the area of a rectangle is:
Area = length * width
Substituting the given values into the formula:
360 = 20 * width
To isolate the width, divide both sides of the equation by 20:
width = 360 / 20
width = 18 centimeters
Now that we have the lengths of both sides of the rectangle, we can calculate the perimeter.
The formula for the perimeter of a rectangle is:
Perimeter = 2 * (length + width)
Substituting the values into the formula:
Perimeter = 2 * (20 + 18)
Perimeter = 2 * 38
Perimeter = 76 centimeters
Therefore, the perimeter of the rectangle is 76 centimeters.