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CHORDS AND CENTRAL ANGLES Lesson 11.2
Page 19
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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
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What is a chord on a circle?
A
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What parts are congruent on circle A?
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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
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When radii are constructed to the endpoint of each chord, what can you
say about the triangles that are formed?
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What can you say about central angles ∠��� and ∠���?
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What can you say about arc BC and arc DE?
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Example 1 (page 21):
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Example 2 (page 22):
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Example: (Not in the book)What conclusions can you make about the following circles and chords?
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Example 3 (page 22):
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Task (page 23):
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ASSIGNMENT 11.2
WB: Page 25 # 1-10
RB: Page U6-28: # 1-8, 10