One centimetre is equal to:

Hint: In order to answer this question, first we will describe or explain the centimetre and also we will explain the conversion of centimetre into the metre by giving the example of the conversion process.

Complete step-by-step answer:
A centimetre is a unit of length equal to one hundredth of a metre. There are \[2.54{\text{ }}centimetres\] in an inch.
It is necessary to convert the length measurement unit from centimetres to inches. The most basic unit conversion is \[cm{\text{ }}to{\text{ }}inches\] , which you can learn in primary school. In a number of mathematical applications, it is one of the most commonly used operations.
In the field of measurement, the basic conversion is to convert centimetres into metres. Now, we will give an examples of it:
(i) Convert $4cm$ into $metre$ :
So, to convert centimetres into metres, we should divide the given value of centimetres by 100 to convert in metres:
$
  \therefore 1cm = \dfrac{1}{{100}}m = 0.01m \\
   \Rightarrow 4cm = \dfrac{4}{{100}}m = 0.04m \;
 $

(ii) Convert $3cm$ into $km$ :
So, to convert centimetres into kilometres, we should divide the given value of centimetres by 100000 or ${10^5}$ to convert in kilometres:
$
  \therefore 1cm = \dfrac{1}{{100000}}km = 0.00001km \\
   \Rightarrow 3cm = \dfrac{3}{{100000}}km = 0.00003km \;
 $

(iii) Convert $2cm$ into $mm$ :
So, to convert centimetres into millimetres, we should multiply the given value of centimetres by 10 to convert in millimetres:
$
  \therefore 1cm = 10mm \\
   \Rightarrow 2cm = 2 \times 10mm = 20mm \;
 $

Note: The metric unit of measurement is centimetres. Most rulers can be used to measure centimetres. It's crucial to double-check that you're looking at the right units, as many rulers show inches as well. If you don't have a ruler, you can approximate a measurement in centimetres using common items on your desk.