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

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.

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