For nos. 11 – 15. Refer to the circle.


____11. Given: circle O, name the central angle

           a. BOA                 b. CD               c. DA                    d. AD


____12. Name the diameter

           a.     AC                  b. AD              c. OB                    d. DC

 
____13. What is the mBOC if m?

           a. 125          b. 135                    c. 155                 d. 165

 

____14. How many inscribed angle does the circle have?  

           a. 4                          b. 3                        c. 2                    d. 1

 
____15. What is the m∠ADC?

           a. 30°      d. 60°             c.90°            d. 180°​