Figure 2.6 Measure the Circle Use a metric ruler marked in centimeters (cm) and millimeters (mm).
Micrometers (um) are not marked on the ruler, but remember that
1000 um would fit in between each millimeter hashmark.
1. Measure the diameter of the circle (Fig 2.6).
mm
2. Now, calculate its diameter in micrometers:
um
3. What is the diameter of the circle in nanometers?
nm