In \triangle ABC, AB=10, AC=18, and \angle B=130^\circ. Let O be the center of the circle containing points A,B,C. What is the degree measure of \angle CAO?
Answer Choices:
A. 20
B. 30
C. 40
D. 50
E. 60
In \triangle ABC, AB=10, AC=18, and \angle B=130^\circ. Let O be the center of the circle containing points A,B,C. What is the degree measure of \angle CAO?
Answer Choices:
A. 20
B. 30
C. 40
D. 50
E. 60