1 Cyclothymic Disorder, or Cyclothymiaâ a mild form of bipolar disorder. 2  People with cyclothymia have episodes of hypomania as well as mild depression for at least 2 years. 3  However, the symptoms do not meet the diagnostic requirements for any other type of bipolar disorder.
Shorter rulers are convenient for keeping in a pocket. Longer rulers, e.g., 18 inches (45 cm) are necessary in some cases. Rigid wooden or plastic yardsticks, 1 yard long and meter sticks, 1 meter long, are also used.
How to Use a Metric Ruler. There are two types of scales commonly used on rulers; Fractional and Decimal. Fractional Rulers have graduations or marks based on fractions, for example 1/2, 1/4 1/8, 1/16, etc.. Decimal Rulers have graduations or marks which are based on the decimal system such as 0.1, 0.01, etc. Decimal Rulers can be based on any measuring system but are usually based on either the English measurement system of inches (in) or the Metric measurement system of millimeters (mm), centimeters (cm) and meters (m).