# Chapter 6 - Review Exercises - Page 306: 10

arc AD=180$^{\circ}$ arc AC=110$^{\circ}$

#### Work Step by Step

2m$\angle$B=AD-(360-DC-AD) 70=AD-360+70+AD 2AD=360 AD=180 AC=360-AD-DC AC=360-180-70 AC=110

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