Se the figure to answer the question that follows. The figure below shows several points, lines and angles:

1. There is a direction of 0 degrees and a direction of 90 degrees that have an unlabelled point of intersection.
2. There is a line from that point of intersection to a second point A.
3. Along the direction of 90 degrees is a point B which creates a line segment with a specific distance from the point of intersection.

If angle DCA measures 20 degrees, what does angle ACB measure?

degrees.