Circles: Arcs and Chords The radius of ⊙Y is 34, AB = 60, and mAC = 71. Find each measure. 9. mBC 10. mAB 11. AD 12. BD 13. YD 14. DC In ⊙X, LX = MX, XY = 58, and VW = 84. Find each measure 15. YZ 16. YM 157