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Arc Lengths and

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Find the Circumference of the Circle. Find the ratio of the ... The unshaded region is also a sector! Slices of Pizza are Sectors! To find the area of a sector: ... – PowerPoint PPT presentation

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Title: Arc Lengths and


1
Section 11-6
  • Arc Lengths and
  • Areas of Sectors

2
Arc Length
  • Part of the Circumference of a circle.

3
  • 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.

4
Example Find the length of arc AB.
5
In General
6
Sector of a circle
  • A region bounded by two radii and an arc of the
    circle.

Sector AOB
The unshaded region is also a sector!
7
Slices of Pizza are Sectors!
8
  • To find the area of a sector
  • Find the Area of the Circle
  • Find the ratio of the measure of the arc to
    the whole circle.
  • Find the product of the ratio and Area.

9
Example Find the area of sector AOB.
10
In General
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