On a miter saw, when you're cutting a 90 degree cut, the miter saw reads zero. On a protractor, it reads 90. So it's an unending source of confusion for people. RON HAZELTON: So Mark, show me how it works.
A ruler is used to measure units of length, inches, feet and yards. Standard rulers have inches on one side and centimeters on the other. A typical ruler measures up to 12 inches, and is equivalent to 30.48 centimeters. This is also equivalent to 1 foot. Each inch on a ruler has markings in between that are a fraction of an inch.
Look at the rule. There are many little lines on the ruler. But only 12 of these lines are numbered. The numbered lines are the inch lines. It is one inch from the end of the ruler to the first numbered line. It is one inch from one numbered line to another numbered line. Measure these lines: Answer 1 3 5 Look at the ruler. Â½ Â½ 1 From the left end of the ruler to 1 is one inch. This inch is divided into two equal parts by a line.