1. Lesson 10-4: Inscribed Angles Geometry CP Mrs. Mongold

2. -Inscribed angle: an angle inside the circle with sides that are chords and a vertex on the edge of the circle Inscribed angle = ½ intercepted arc Inscribed angle = ½ intercepted arc -An inscribed right angle, always intercepts a semicircle -If two or more inscribed angles intercept the same arc, they are congruent

3. A C E X Ex: Angle CAE = ½ arc CE

4. B A C Inscribed angle BAC intercepts a semicircle- so angle BAC =90

5. D E F G Inscribed angles GDF and GEF both intercept arc GF, so the angles are congruent

6. Find the measure of angle X

7. Find the measures of angles 1, 2, 3, and 4

8. Find the measure of angle R

9. Find the measure of angle I

10. Find the measure of angle B

11. Find the measure of angle D

12. Find angle S and T