Question

how is copying a line segment similar to copying an angle?

Explanation:

Both copying a line segment and copying an angle involve using a compass. For copying a line segment, we use the compass to measure the length of the original segment and then transfer that length to a new location. For copying an angle, we use the compass to measure the arc lengths related to the original angle (e.g., the arc that intersects the two sides of the angle) and then replicate those arc - length measurements to construct the copied angle.

Answer:

Both use a compass for measurement and replication.