3. Customary System: Used mainly in the United States Metric System: Used in the rest of the world and in most scientific research and development.

4. Linear Units: Inches: Short lines Feet: Medium Lines Yards: Long lines Miles: Long Distances

5. Linear Units: Measure how long a line is including: length, width,distance, perimeter, area A ruler is a tool used for linear measurement

6. Linear Units: 12 inches = 1 foot 3 feet = 1 yd 36in = 1 yd 5280ft = 1 mile

7. Linear Units: Cm- measure short lines M = measure medium lines km- measure long lines

8. Linear Units: 100cm = 1 m 1000 m = 1 km

9. What unit measures short lines in the customary system? inches

10. What unit measures short lines in the metric system? centimeters

11. What unit measures medium in the customary system? feet

12. What unit measures long lines in the metric system? meters

13. What unit measures long lines in the customary system? yards

14. What unit measures long distances in the customary system? miles

15. What unit measures long distances in the metric system? kilometers