Question

for items 2–5, refer to ∠cab shown.
select the step that is not part of the process for copying ∠cab.
image of angle with vertex a, sides ab (horizontal) and ac (upward)
a. draw a line and mark a on it.
b. set the compass to length ab.
c. place the compass point at a and mark an arc crossing the new line.
d. label the intersection of the arc and the new line c.

Explanation:

To copy an angle (∠CAB), the standard steps involve:

1. Drawing a new line with a vertex (A') (Option A is part of it).
2. Placing the compass at A (vertex of original angle), drawing arcs on the sides of ∠CAB. Then, placing the compass at A' and marking an arc on the new line (Option C is part of this).
3. Measuring the arc length between the intersections on the original angle’s sides and transferring it to the new angle.

Option B: Setting the compass to length AB is not part of angle - copying. Angle - copying focuses on arc lengths related to the angle’s sides (not the length of a side like AB). Option D: Labeling the intersection as C' would be part of defining the new angle’s side. So the step not part of the process is B.

Answer:

B. Set the compass to length AB