Length

– The distance from one point to another.

How many caterpillars long is the pencil?

Width

• The distance across from side to side.

Width 4 inches

Perimeter

• The distance around a figure 2 + 6 + 2 + 6 = 16 meters

2 meters 2 meters

6 meters

6 meters

Perimeter

• The distance around a figure

Example: 2 cm + 3 cm + 3 cm = 8 cmThe perimeter of this figure is 8 centimeters.

Metric System• The Metric system is a decimal system of units based on

• the meter which measures length,

millimeter/centimeter/decimeter/decameter/hectometer/Kilometer

• the gram which measures massmilligram/gram/Kilogram

• and the liter which measures capacitymilliliter/Liter

Millimeter

• About the width of a piece of poster board

Centimeter – A metric unit of length

Your pinky is about one centimeter wide.

Meter

• About the length of a baseball bat.

Kilometer

• Long distances are measured in Kilometers.

CustomaryEnglish System

• Units of length are measured ininch/ feet/ yard/ mile

• Units of mass are measured inounce/ pound/ ton

• Capacity is measured inounce/ cup/ pint/ quart/ gallon

Inch

• The width of a postage stamp is about 1 inch.

Foot

• A 12 inch ruler is 1 foot long.

Yard

• The width of a door is about 1 yard.

Mile

• Long distances are measured in miles.