Need help!!! In the diagram of circle o, what is the measure of ABC?
Answer:54 degrees Step-by-step explanation:I would turn this into a quadrilateral by connecting C to O and O to A. The angles of a quadrilateral add up to 360 degrees. So we have 90+90+126+angleABC=360 180+126+angleABC=360 306+angleABC=360 angleABC=360-306=54