Question

AD is tangent to circle B at point C. What is the measure of BCA? O 40° O 50° O 90° O 180° ​

Answer 1

C

90

Explanation:

B is likely the center, I think. You can't do it otherwise.

The tangent and a radius of a circle meet at 90o

therefore the answer is 90.

All of this could be confirmed with a diagram.