You use a ruler or similar object that is marked with centimeters. If your ruler only has inches, measure the inches, then multiply with 2.54 to get centimeters.
30 centimeters 30 centimeters
If the lines are on the opposite side of the inches on the ruler, then yes. You must keep in mind, however, that a ruler is used for inches and that the centimeters may not be marked.
you read a ruler by conting the little lines first
the aleks ruler can measure what ever it wants, including centimeters, because it is the ruler.
13 inches are 33.02 centimeters.
A standard metric ruler is just slightly longer than 30 centimetres and slightly longer than 12 inches.The "slightly longer" is for the extra bits of ruler that stick out in front of the 0 (zero) cm/in at the beginning of the ruler and behind the 30 cm/12 in mark at the end of the ruler
A metric ruler is not a fixed length. A school ruler is normally 12 inches and this would be 30 cm, but I have a workshop ruler that is 60 cm, and you can buy longer ones. The thing to remember is that 1 inch = 2.54 cm
I Use A Ruler For Measuring The Distance Between Blocks In A Wall Or Floor
The customary ruler uses both inches and centimeters.
a 30cm ruler
You use a ruler or similar object that is marked with centimeters. If your ruler only has inches, measure the inches, then multiply with 2.54 to get centimeters.
The first line, not the edge of the ruler.
It will be on the Centimeters
There are certain ISO standards for different rulers. But there is no 'standard' size. So it would depend on the one to which you refer.
30 centimeters
It is centimeters and inches.