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

Respuesta :

Answer:     its 55 on edge

Step-by-step explanation:

i got it right lol

Answer:

55 degrees

Step-by-step explanation: