Observe the diagram and fill in the blanks.
f1.PNG

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. 'A' , 'O' , 'B' are points.

2. 'A' , 'O' , 'C' are points.

3. 'A' , 'B' , 'C' are points.

4. is the point of concurrency.

5. ∠AOB is a angle.

6. ∠BOC is an angle.

7. ∠AOC is an angle.

8. ∠AOB and ∠BOC form a pair of angles.

9. AB is the of the circle.

10. OB is the of the circle.