To convert 18 centimeters (cm) to inches (in), we first need to understand the conversion factor between the two units. The conversion factor is 2.54, meaning that 1 inch is equal to 2.54 cm. This means that we can convert from cm to in by multiplying the length in cm by 2.54.
Step 1: Write down the given length in cm
In this case, the given length is 18 cm.
Step 2: Set up the conversion equation
To convert from cm to in, we will use the equation:
length in inches = length in cm x 2.54
Step 3: Plug in the value for length in cm
Substitute 18 cm for length in cm in the equation:
length in inches = 18 cm x 2.54
Step 4: Simplify the equation
Using the order of operations, simplify the equation by multiplying 18 cm by 2.54:
length in inches = 45.72 cm
Step 5: Convert to the final unit
The final step is to label the answer with the correct unit, in this case, inches:
length in inches = 45.72 in
Step 6: Round the answer (if necessary)
If the answer needs to be rounded to a specific number of decimal places, now is the time to do so. In this case, 45.72 inches can be rounded to 45.7 inches.
Therefore, 18 cm is equal to 45.7 inches.
One important note to remember when converting between units of length is to always label your answer with the correct unit. This will help to avoid confusion and ensure accuracy.