Answer:
<h2>The angle ACB is 9 degrees.</h2>
Step-by-step explanation:
To solve this problem we just need to observe the point B, which has two angles and both of them are on a straight angle, this means that the sum of angle ABC and CBD is 180, that is
We know that , then
Now, in the triangle ABC, we know that all three angles must sum 180
Therefore, the angle ACB is 9 degrees.