How to Read a Ruler – U.S Customary System. A ruler is used to measure units of length, inches, feet and yards. A standard ruler is 12 inches or 1 foot long. 3
In science class, most measurements are much smaller than a meter. A metric ruler is the standard instrument for measurement in the scientific laboratory.
How to read a ruler.. A ruler used to be called a rule, and rulers would be rules.. Since millimeters are 1/10th of a centimeter, if you measure 7 marks after a .
Learn to read and use roll-up, self-retracting tape measures for all of the most common. A tape measure, also called measuring tape, is a type of flexible ruler.