Answer: ABC = 32 degrees
Step-by-step explanation:
We are already given the measurement of angle ACB, which is 58. And given AC is tangent to circle B we also know that BAC is 90 degrees.
So,
ABC = 180 - (BAC + ACB)
ABC = 180 - (90 + 58)
ABC = 180 - (148)
ABC = 32 degrees
Hope I could help :)