1. 4.1d: Angles from Secants and Tangents
CCSS
GSE

2. http://www. regentsprep. org/Regents/math/geometry/GP15/CircleAngles

3. Ex.

4. http://www. regentsprep. org/Regents/math/geometry/GP15/CircleAngles

5. Ex

6. chord
A Secant is a line that goes through a circle.
It contains a chord, which is the segment in the circle.

7. 1)

8. 2) 3)

9. Remember that this theorem only used the intercepted arcs.
Recap of what the 3 possibilities looks like:
Remember that this theorem only used the intercepted arcs.
Therefore, the red arc in the picture below is not used in this formula.
                                                                                               

10. Example
Find x

25. The End 