Transcript Length
Measurement - Length
Digital vs. Analog
There are many other types of measuring
instruments that measure various other things.
Regardless of what you are measuring, the
instrument you are using may have either a
digital read-out or an analog read-out.
Digital read-outs are the simplest to read. The
measurement is given in numbers just the way
you need to record it.
Analog read-outs are in a form similar to that of
a ruler.
An indicator, such as a needle, points to the
correct measurement.
You must then determine the measurement by
reading the scale.
Length
Length is how long an object is; and it is
measured in inches, feet, yards, and miles.
These are called English units of measurement.
There are also Metric units that include
millimeters, centimeters, meters, and kilometers.
Length
Length is normally measured using a ruler or a tape
measure.
Half way between each inch mark is another large
mark that shows the half-inch.
There are three smaller marks between the inch and
half-inch mark that divide the inch into eighths.
The smallest marks of all divide the inch into
sixteenths.
Metric Ruler Measures
The centimeter side is marked somewhat differently.
Each small mark is 1/10 cm = 0.1 cm = 1 mm
½ of a centimeter = 5 millimeters (mm).
Here are 10 mm = 1 cm. One-tenth is equal to 0.1.
5 cm + 4 mm = 5.4 cm or 54 mm.
The bright white mark on the ruler below is at 13.3 cm
or 133 mm.
Questions