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.

Answer 1

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.

Answer 2

I didn't see any incorrect steps.
But a graphic is attached.

Answer 3

can you anser part c in words please @wolf1728

Answer 4

As for a proof of that construction here's a link http://www.mathopenref.com/constbisectline.html
Scroll past the animation and you'll see the proof.
Basically it works because you are constructing four congruent triangles.