Answer:
Perimeter = 210 mm
Step-by-step explanation:
First, we need to convert 4.5 cm and 6 cm to mm. To convert the numbers, we need to multiply the number by 10, so:
4.5 cm = 4.5 x 10 mm = 45 mm
6 cm = 6 x 10 mm = 60 mm
Then, the perimeter is equal to the sum of two times the width and two times the length, so:
Perimeter = 2(Width) + 2(Length)
Perimeter = 2(45 mm) + 2( 60 mm)
Perimeter = 90 mm + 120 mm
Perimeter = 210 mm
Therefore, the perimeter of the rectangle is 210 millimeters.