The perimeter of the rectangle is 48cm. One side 12cm. What is the length of the second side?

Given:
The perimeter of the rectangle is 48 centimeters.
One of its sides is 12 centimeters long.
Let’s find what the sum of one two identical sides is equal to:
12 + 12 = 24 centimeters.
Let’s find how much is the sum of two other identical sides:
48 – 24 = 24 centimeters.
Let’s calculate what one adjoining side is equal to:
24: 2 = 12 centimeters.
This value corresponds to the third answer.
Answer: 12 centimeters.