1. Lesson: 10 – 4 Inscribed Angles
Geometry
Lesson: 10 – 4
Inscribed Angles
Objective:
Find measures of inscribed angles.
Find measures of angles of inscribed polygons.

2. Inscribed angle
An angle that has a vertex on a circle and sides that contain cords of the circle.
Intercepted arc:
Has endpoints on the sides of an inscribed angle
and lies on the interior of the angle.

3. 3 cases of inscribed angles

4. Inscribed Angle Theorem

7. Theorem 10.7

8. 3x – 5 = 2x + 15
x = 20
=3(20) – 5
=55

9. Theorem 10.8

10. 4x x – = 180
4x x – 3 = 90
13x – 1 = 90
13x = 91
x = 7

11. Theorem 10.9

14. Homework
Pg – 34 E (not 22)