Kathy uses the following steps to construct a perpendicular line through a point C on a line segment.

Step 1: From point C, draw two arcs intersecting the line segment in points A and B.
Step 2: Using slightly more compass width draw two arcs from point A, one above and the other below the line segment.
Step 3: Using the same width of the compass, draw two arcs from point B, above and below the line segment.
Step 4: Label the point of intersection of the arcs above the line segment as F and below the line as E.
Step 5: Using a compass, join E and F.

Question

Kathy uses the following steps to construct a perpendicular line through a point C on a line segment.
 
Step 1: From point C, draw two arcs intersecting the line segment in points A and B.
Step 2: Using slightly more compass width draw two arcs from point A, one above and the other below the line segment.
Step 3: Using the same width of the compass, draw two arcs from point B, above and below the line segment.
Step 4: Label the point of intersection of the arcs above the line segment as F and below the line as E.
Step 5: Using a compass, join E and F.

anonymous · Answer

Part A: Which is the first incorrect step?
Part B: Using complete sentences, explain your answer for Part A.
Part C: Explain why a compass works for the construction done by Kathy.

roadjester · Answer

Ok, that made no sense to me...sorry, haven't done geometry in a LONG time.

roadjester · Answer

@KingGeorge hey my liege, your humble servant is in need of your assistance.
@Callisto hiya callisto, think you can help?

anonymous · Answer

Thanks you guys but i figured it out :)

roadjester · Answer

Always good to figure things out on your own. But remember that everyone on OS (except the selfish ppl) are there for you if you need help. That's how we learn.