1.2 – Imperial Measurement
FMP 10
Warmup: Think of a referent for something that has a length of:
a. One inch
b. One foot
c. One yard
d. One mile
Example #1: Complete the following chart:
Imperial Unit Abbreviation
Referent
Conversion
Inch
1 in. = ____ ft
Foot
1 ft = 12 in
1 yd = 3 feet
1 yd = ____ in.
1 mi. = 1760 yd.
1 mi. = ____ ft.
Yard
Mile
Example #2: How many inches tall is a 5’5” person?
Example #3: Convert 51 in. into feet & inches.
Example #4: How many miles are in 12 640 feet?
Practice: (Worksheet 1.2.1, 1.2.2, 1.2.3); Page 29, #1 – 7
1.2 – Imperial Measurement
FMP 10
Imperial Measuring Instruments:
 Imperial rulers usually divide inches into 16 subdivisions.
 In other words, each ‘tick’ is 1⁄16th of an inch long:
Example #5: What is the following measurement?
Using Imperial Calipers:
1. Read the whole number and tenth values on the fixed scale using to ‘0’ on
the moving scale. This reading is:
2. Determine how far the 0 in the moving scale is past the nearest number on
the fixed scale. In this case, it is:
3. Identify what number on the moving scale matched up perfectly with a line
on the fixed scale:
4. Add the measurements from steps 1, 2 and 3:
5. Ask yourself if the number makes sense!!
Practice: (Worksheet 1.2.1, 1.2.2, 1.2.3); Page 29, #1 – 7
1.2 – Imperial Measurement
FMP 10
Example #6: Determine the reading on the following Imperial calipers:
Scale Diagrams:
 Maps are not drawn to the same scale as the land they represent (the map
would be huge!). They always have a scale, for example, 1:4,000,000. This
means one unit on the map is 4,000,000 units in real life.
Example #7: A map of Alaska has a scale of 1:4,750,000. On the map, the distance
11
between Paxson and the Canadian border is 3 16 in. What is the distance, in real
life, to the nearest mile?
Practice: (Worksheet 1.2.1, 1.2.2, 1.2.3); Page 29, #1 – 7
1.2 – Imperial Measurement
FMP 10
Example #8: This photograph shows a polar bear using a scale of 1:24.
a. How high is the bear’s back, in inches?
b. What is the length of a bear, in feet & inches?
Example #9: What has more viewing area, a 32 inch 4:3 television or a 32 inch
16:9 television?
Practice: (Worksheet 1.2.1, 1.2.2, 1.2.3); Page 29, #1 – 7