A ruler is a straight-edged instrument, often made of plastic or wood, which is designed as a guide in drawing straight lines and measuring small increments. There are two majoy types of rulers: the metric ruler and the English ruler. Metric rulers come in millimeters and centimetres, with numbers appearing on the centimeter marks, while English rulers come in inches, with numbers appearing on the inch marks. Here are some instructions on interpreting a metric ruler.
Instructions
Metric Ruler
1), Count the number of marks between the numbers, remembering that the numbers on a metric ruler represent centimeters. Note that there are 10 millimeter marks between each centimeter mark.
2), Look for the slightly longer millimeter mark in the center of the millimeter marks. This represents the halfway point between the centimeter preceding and the centimeter following.
3), Read the metric ruler by looking for the preceding centimeter, counting the millimeters and using the millimeter as a decimal. For example, a mark four spots after 3 would read 3 centimeters, 4 millimeters---or 3.4 centimeters.
Instructions
Metric Ruler
1), Count the number of marks between the numbers, remembering that the numbers on a metric ruler represent centimeters. Note that there are 10 millimeter marks between each centimeter mark.
2), Look for the slightly longer millimeter mark in the center of the millimeter marks. This represents the halfway point between the centimeter preceding and the centimeter following.
3), Read the metric ruler by looking for the preceding centimeter, counting the millimeters and using the millimeter as a decimal. For example, a mark four spots after 3 would read 3 centimeters, 4 millimeters---or 3.4 centimeters.
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