Which is a line segment?

D.

Step-by-step explanation:

Step 1

Mark a point (A) hat will be one endpoint of the new line segment.

Step 2

Set the compasses' point on the point (B) of the line segment to be copied.

Step 3

Adjust the compasses' width to the point (C). The compasses' width is now equal to the length of the line segment(BC).

Step 4

Without changing the compasses' width, place the compasses' point on the the point (A) on the line you drew in step 1.

Step 5

Without changing the compasses' width, Draw an arc roughly where the other endpoint will be.

Step 6

Pick a point (D) on the arc that will be the other endpoint of the new line segment.

Step 7

Draw a line from (A) to (D)

Step 8

Done. The line segment (AD)

is equal in length (congruent to) the line segment (BC).

true? is that what you're asking or do you mean something else?