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Detailed explanation-1: -Answer. Perimeter of a square = sum of length of all sides. lengths..so, 6.4 X 4 = 25.6 cm. The perimeter of the square is 25.6 cm.

Detailed explanation-2: -Therefore, perimeter of a regular octagon of side 6 . 5 c m is 52 c m .

Detailed explanation-3: -The perimeter of a square is the total length of all the sides of the square. Hence, we can find the perimeter of a square by adding all its four sides. All the sides of a square are equal. So, the perimeter of a square is calculated by adding the side of a square four times.

Detailed explanation-4: -Since all the sides of a square are equal, therefore, the perimeter of square will be 4 times its side, i.e. 4 × Side.