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Areas of Circle, Segments, and Sectors - Lesson 11-6

Today we started by remembering the formula for the area of a circle:

Area of a Circle

We practiced this by applying it to a couple of problems (these should all be pretty straight forward for you to solve):

Circle Area Example 1

Circle Area Example 2

Circle Areas Example 3

Circle Area Example 4

At this point we need to define some new areas that are associated with circles.

Definition of Sector

Definition of Segment

Definition of Annulus

For each of these, a different technique is used to find its area:

Theorem 106 - The area of a sector

Area of a Segment

Area of an Annulus

Here are some examples using the information in today's lesson:

Sector Area Example 1


Sector Area Example 2


Segment Area Example

Other Links
Class Notes
Lesson 11-1
Lesson 11-2
Lesson 11-3
Lesson 11-4
Quiz Topics
Lesson 11-5
Lesson 11-6
Lesson 11-7
Lesson 11-8
Test Topics
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