The perimeter of the rectangle is 9dm. 2cm. The length of one side is 3 dm. 5cm. find the length of the second side

Let’s express the values in centimeters.
P = 9dm2cm = 9 * 10cm + 2cm = 92cm.
Side = 3 dm 5 cm = 3 * 10 cm + 5 cm = 35 cm.
The perimeter of a rectangle is calculated as the sum of its length and width multiplied by two.
First, we calculate the semi-perimeter of the rectangle:
1) 92 cm: 2 = 46 cm semi-perimeter of a rectangle.
Let’s calculate the length of the second side of the rectangle:
2) 46 cm – 35 cm = 11 cm length of the second side of the rectangle.
Answer: the length of the second side of the rectangle is 11 cm (1 dm 1 cm).