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# 1.1 Imperial Measurements - PowerPoint PPT Presentation

1.1 Imperial Measurements. MFM2P. In the beginning. Back in the day (1000s of years ago) when people built things themselves, it wasn’t necessary to measure things because everyone did it themselves. I need a bolt as wide as thumb. What you talkin’ ‘bout Willis?.

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### 1.1 Imperial Measurements

MFM2P

• Back in the day (1000s of years ago) when people built things themselves, it wasn’t necessary to measure things because everyone did it themselves.

I need a bolt as wide as thumb

• However, projects became more complicated, it became necessary to have others work different parts, therefore they had to standardize measurement.

moron…

Sir, I don’t know what your thumb looks like…

• So they decide to take the most popular guy, measure his thumb and call it an inch. This guy was the King!

An inch was the width of a thumb

A footwas the size of the kings foot, which eventually became 12 inches.

A yard was the distance from the tip of a man's nose to the end of his outstretched arm. Eventually, 3 feet became a yard

• The British empire used this method to devise measurements for mass, volume and time. For instance a pound was equal to 7002 troy grains

• Other countries developed their own units of measure

7001? That’s stupid! A pound should be 7002…

Your sands are no match for our stones!

What’s a troy grain? We use wheat seeds

• Eventually (in the 1800s), the French developed the Metric System

• In the 1970s many commonwealth (former British colonies) switched to the metric system.

• Today, the entire world is metric, except for the US, Myanmar and Liberia

Unfortunately, the US has a HUGE influence on our culture. This influences the way we communicate and think about various systems of measurement.

Time is in seconds, minutes, hours, days,etc…

How tall are you?  5 feet 10 inches

How much do you weight?  210 lb

Football field  yards

Fluids (Guinness)  pint

Length

inches (inor “), foot (ftor ‘), yard (yd), mile (mi)

Volume

Teaspoon (tsp), tablespoon (tbsp), fluid ounce (floz), cup (c), pint (pt), quart (qt), gallon (gal)

Weight

Ounce (oz), pound (lb), ton (tn)

If 1 yd = 3ft, then 4 yd2 = ft2

1 yd

3ft

4 yd2

2 yd

6 ft

36 ft2

2 yd

6 ft

Converting Feet to Inches

1 foot = 12 inches

8.5’ = 8.5 feet

2’ 7” = 2‘ + 7”

3’ = 3 feet

= 8.5 x 12”

= (2 x 12”) + 7”

= 3 feet x 12 inches

1 foot

= 36”

= 102”

= 24” +7”

= 31”

Converting Inches to Feet

1 foot = 12 inches

71 inches =

How many times does 12 go into 71?

71 inches = 5 feet + ??? inches

71 inches = 5 feet + 11 inches

5’ = 60”

71” -60” = 11”

Word Problems

The school gymnasium floor needs to be resurfaced. Hardwood flooring costs \$6 per square foot plus \$2.50 per square foot for installation. The gym measures 180ft by 220ft.

a)Size of gym = (length) (width)

= (220 ft) (180 ft)

= 39 600ft2 Therefore the gym is 39 600ft2.

b) Cost to buy hardwood = (\$6.00/ft2) (39 600ft2)

= \$237 600 The cost of the hardwood is \$237 600.

c) Cost of Installation = (\$2.50/ft2) (39 600ft2)

=\$99 000 Therefore the cost of installation is \$99 000