Find the perimeter of a square with sides 15 cm. Reduce each side of it by 6 cm and find the perimeter of the new square.

According to the definition given in the mathematics textbook: perimeter is the sum of the lengths of all sides. Since a square is a figure whose sides are equal, it means that the perimeter of the square is equal to the product of the length of any of its sides by 4.

It turns out that the perimeter of a square with a side of 15 cm is equal to:

15 * 4 = 60 cm ^ 2.

reduce its side by 6 cm,

15 – 6 = 9 cm.

Now let’s find the perimeter of the new square:

4 * 9 = 36 cm ^ 2.

Answer: the perimeter of the first square is cm ^ 2, and the second is 36 cm ^ 2.