There is a rectangle with sides 12 and 10 cm. How do you change its length to make a square?

The first action is to shrink one side to get a square. For this 12 – 2 = 10 cm.

Now we know that the two sides are equal to 10 cm, we got a square.

Next, you need to find the perimeter. The perimeter is the sum of all sides, since all sides of a square are equal, you need to add all sides 10 + 10 + 10 + 10 = 40 cm.



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