To convert 21 cm into inches, you can use the following formula:
1 inch = 2.54 cm
So, to convert 21 cm into inches, you would divide 21 by 2.54:
21 cm ÷ 2.54 = 8.27 inches
Therefore, 21 cm is equal to 8.27 inches.
Real-life example:
Let’s say you have a piece of paper that measures 21 cm in length. To convert this measurement into inches, you would divide 21 by 2.54:
21 cm ÷ 2.54 = 8.27 inches
So, the length of the paper is 8.27 inches.
FAQs:
1. Why do we need to convert units?
Converting units allows us to easily compare measurements in different systems and make calculations more convenient. It also helps in understanding and communicating measurements effectively.
2. Can I convert units using a calculator?
Yes, you can use a calculator to convert units by simply dividing or multiplying the given value by the conversion factor.
3. Is there a simple way to remember conversion factors?
One common method is to create a mnemonic device or use a conversion chart to help remember common conversion factors. Practice and repetition can also help in memorizing these factors.