CK-12 Geometry-Concepts

9.8. Angles Outside a Circle http://www.ck12.org

11.

12.

13.

14. Prove the Outside Angle Theorem

Given: Secant rays

−→

ABand

−→

AC

Prove:m^6 a=^12

(

mBĈ−mDÊ

)

15. Draw two secants that intersect:
    a. inside a circle.
    b. on a circle.
    c. outside a circle.