Chapter 12.3 Inscribed Angles

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Presentation transcript:

Chapter 12.3 Inscribed Angles

Vocabulary

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

Example #1 Find X X 138

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

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

Example #2

Classwork Pgs 681-682 #1-22