CHORDS AND CENTRAL ANGLES Lesson 11.2

Page 19

Today's Objectives ~

By the end of the lesson you should be able to:

• Explain the relationships among inscribed angles, radii, and

chords of a circle.

Things to remember from our last lesson:

• Central Angle:

• Inscribed Angle:

• Intercepted Arc:A

What is a chord on a circle?

A

What parts are congruent on circle A?

If we draw two different diameters in circle A, what kind of angles are

formed at the center of the circle?

Can you find any congruent chords? A

When radii are constructed to the endpoint of each chord, what can you

say about the triangles that are formed?

What can you say about central angles ∠��� and ∠���?

What can you say about arc BC and arc DE?

Example 1 (page 21):

Example 2 (page 22):

Example: (Not in the book)What conclusions can you make about the following circles and chords?

Example 3 (page 22):

Task (page 23):

ASSIGNMENT 11.2

WB: Page 25 # 1-10

RB: Page U6-28: # 1-8, 10