1. Mr. O’Rourke Technology Education
Measurement
Mr. O’Rourke
Technology Education

2. History of Measurement
Ancient Egypt
Measured with fingers, palms, arms, etc.

3. US Standard Units Focusing on Length Also known as Inches Feet Yards
Miles
Also known as
English Units
US Customary Units

4. Measuring Length (standard”)
Dial Calipers
Measure inches down to .001”
Ruler
Measure inches (usually 12”)
Each inch broke into 16ths
Yard Stick
36”=3’
Tape Measure
Measure feet and inches (25’+)

5. Metric System Based on the Meter and the number 10
Name The Number Prefix Symbol
trillion 1,000,000,000,000tera T
billion 1,000,000,000 giga G
million 1,000,000 mega M
thousand 1,000 kilo k
hundred hecto h
ten 10 deka da
unit 1
tenth deci d
hundredth centi c
thousandth milli m 1 meter=39.38”
millionth micro µ
billionth nano n
trillionth pico p