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.
Step 1, Locate the centimeters on the ruler. Many rulers have two sets of numbers. You are looking for the metric set of numbers. This side of the ruler will be labeled cm{\displaystyle cm}, the abbreviation for centimeters.[1] It might also be labeled mm{\displaystyle mm}, the abbreviation for millimeters. Millimeters are the smaller metric units shown on the ruler by the shorter lines in between ...Step 2, Understand the relationship between a millimeter and a centimeter. If you look ...