1. Section 10.3 Inscribed Angles Geometry April 10, 2004

2. Find the measure of the angle. m  ABC = ½ (196) = 98 

3. Theorem 10.9  If two inscribed angles of a circle intercept the same arc, then the angles are congruent.  J =  K  J =  K

4. Homework  p.619 (9-23)

5. Inscribed Angles  Inscribed Angle – an angle whose vertex is on a circle and whose sides contain chords of the circle Intercepted arc – an arc that lies on the interior of an inscribed angle Intercepted arc – an arc that lies on the interior of an inscribed angle

6. Measure of an Inscribed Angle  If an angle is inscribed in a circle, then its measure is half the measure of its intercepted arc. m  ADB = ½ mAB m  ADB = ½ mAB

7. Find the measure of each arc or angle. 1.m ADC = 180 