Circumference and Arc Length

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Section 11-4

• Circumference and Arc Length

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Circumference of a circle

• Distance around the circle

Formula
or
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Arc length

• Part of the Circumference of a circle.
• It is found in linear units

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To find the length of an arc

• Find the Circumference of the Circle
• Find the ratio of the measure of the arc to the
  whole circle.
• Find the product of the ratio and Circumference.

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In General
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Example