The problem requires us to construct an acute angle. The vertex of the angle should be at point A. One ray of the angle should pass through point B. The other ray should pass through one of the unlabeled black points such that the angle formed is acute (less than 90 degrees).

1. Problem Description

The problem requires us to construct an acute angle. The vertex of the angle should be at point A. One ray of the angle should pass through point B. The other ray should pass through one of the unlabeled black points such that the angle formed is acute (less than 90 degrees).

2. Solution Steps

Step 1: Drag the vertex of the angle to point A.

Step 2: Drag the endpoint of one of the rays such that the ray passes through point B.

Step 3: We need to position the remaining ray to pass through one of the other points, such that it forms an acute angle.

Looking at the diagram, the point at the top looks like the only one that would form an acute angle with the ray through point B when the vertex is at point A. So we drag the endpoint of the other ray to pass through the topmost unlabeled black point.

An acute angle is an angle less than $90$ degrees.

3. Final Answer

The solution involves positioning the vertex at point $A$, one ray through point $B$, and the other ray through the topmost unlabeled black point. The final angle should be acute.