The perimeter of the rectangle is 38 cm, width is 9 cm. Find the length of the rectangle. please help me what to write

The perimeter of the rectangle is 38 cm, width is 9 cm. Find the length of the rectangle. please help me what to write in a notebook to draw a rectangle or just find the perimeter of the rectangle and write.

The perimeter of a rectangle is the sum of the lengths of all its sides. The formula for finding the perimeter is:

P = a + a + b + b, where P is the perimeter, a, b are the sides of the rectangle.

If we know the perimeter of the rectangle and the length of one of its sides, then we can calculate what the second side of the rectangle is. We substitute the existing values in the perimeter formula and find out what the second side is equal to, if we are given that the perimeter is 38 cm and the width is 9 cm.

38 = 9 + 9 + b + b;

38 – 9 – 9 = 2b;

20 = 2b;

b = 20/2;

b = 10 cm.

Answer: The length is 10 cm.