The perimeter of the rectangle below is 80 units. Find the length of the side CD.
oops. My bad
CD = 40-AD
To find the length of the side CD, we need to first understand the concept of perimeter and the properties of a rectangle.
The perimeter of a rectangle is defined as the total distance around the outside of the shape. In other words, it is the sum of the lengths of all four sides of the rectangle.
In this case, we are given that the perimeter of the rectangle is 80 units.
A rectangle has two pairs of equal-length sides. Let's assume that the length of the two parallel sides (AB and CD) is denoted by l, and the length of the two perpendicular sides (BC and DA) is denoted by w.
Since the opposite sides of a rectangle have the same length, this means that AB = CD = l and BC = DA = w.
To find the length of side CD, we need to divide the perimeter by 2, because the perimeter is the sum of all four sides and we are looking for the length of only one side.
So, we can set up the equation:
CD = perimeter / 2
CD = 80 / 2
CD = 40
Therefore, the length of side CD in the given rectangle is 40 units.