Is tangent to the circle with center at b. the measure of ∠acb is 24°.what is the measure of ∠abc? enter your answer in the box. m∠abc = °circle b with a tangent, a chord, and a line segment. point a is at 12 o clock on the circle. point c is at 2 o clock outside of the circle. chord a b and segment b c meet at point b in the center. tangent a c passes through point c.