angles OBA and OCA are right
angle BOC is 90-40 = 50
ABC =180 - 20 - 90 = 70 = ACB
ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.
2 answers
Below is the circle with center o. Given 70⁰ ,find BAC