A rectangle and a square have the same perimeter. The side of the square is 14cm.

A rectangle and a square have the same perimeter. The side of the square is 14cm. The width of the rectangle is 7cm. Find its length.

The perimeter represents the sum of all sides of a geometric shape. Find the perimeter of the square:

P = 4 * 14 = 56 cm.

Therefore, the perimeter of the rectangle is also 56 cm. The sides of the rectangle are equal in pairs. Let’s calculate the sum of the 2 sides of the rectangle:

7 * 2 = 14 cm.

Now we can find the length of the rectangle:

56 – 14 = 42 cm;

42: 2 = 21 cm.

Answer: The length of the rectangle is 21 cm.