It is often called a straight-edge.
Use a tape measure!
use a yard stick
It could be a ruler. Just a number line.
It depends on your ruler and what units are on your ruler. To measure to the nearest inch just find the inch measurement and round up or down to get to the nearest inch in your measurement is between two whole numbers.
i think you can use a ruler not sure
It could be called a straight edge.
Put a ruler next to it and read the little numbers on the ruler...
2.5cm
by the numbers that are marked there
Stright edge
The numbers are to the left of the inch markers.
"Communist ruler" is contradiction in terms, since communism, by definition, is without government.
A secular ruler is a political leader who exercises authority over a state or territory without being directly affiliated with a specific religious institution or guided solely by religious laws. They govern in a way that is independent of religious influence and may uphold a separation between religious and governmental matters.
A length of two units!
inches, centimeters and millimeters
They both have numbers.
The one with shorter distances between the numbers.