JonaFl16 JonaFl16 02-05-2020 Mathematics contestada Quadrilateral Q O B C is inscribed within circle O. Sides A C and C B are congruent. Arc A B is 220 degrees. What is the measure of angle OAC if major arc AB measures 220 degrees? 55° 70° 110° 140° The answer is 55, But can someone explained to me