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


11. Given: circle O, name the central angle

a. BOA       b. ACD          c. CDA             d. CAD


____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°​