Measuring Length

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Measuring Length

• Using Centimeters

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example

• The line is 4.2 cm.
• Start the ruler at zero.
• The tiny spaces between the larger numbered lines
  are millimeters.
• They are one tenth of a centimeter.
• Notice the line is 4 whole centimeters and two
  tenths of centimeter.

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Millimeters

• Each centimeter has 10 smaller divisions.
• These are millimeters.
• 3.4 centimeters or 3.4 cm is the same as 3
  centimeters and 4 millimeters.

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• Perimeter

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Perimeter

• Add the lengths of all the edges
• This is the perimeter of a shape.

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