The measure of is 126. What is the measure of ABC, the tangent-chord angle?

A. 126

B. 66

C. 63

D. 152

Use the theorem above to find the measure of angle formed by the intersection of the tangent that intersects chord AC.

By the theorem, the measure of angle is half of the intercepted arc which is 126.

Then, (1/2) · 126 = 63;

The correct answer is C. 63;