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Chapter 12.3 Inscribed Angles

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Presentation on theme: "Chapter 12.3 Inscribed Angles"— Presentation transcript:

1 Chapter 12.3 Inscribed Angles

2 Vocabulary

3 Theorem 12.9 Inscribed Angle Theorem
The measure of an inscribed angle is half the measure of its intercepted arc C A B

4 Example #1 Find X X 138

5 Corollaries to the Inscribed Angle Theorem
1) Two inscribed angles that intercept the same arc are congruent 2) An angle inscribed in a semicircle is a right angle 3) The opposite angles of a quadrilateral inscribed in a circle are supplementary

6 Theorem 12.10 The measure of an angle formed by a tangent and a chord is half the measure of the intercepted arc

7 Example #2

8 Classwork Pgs #1-22

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