Question

Robert is completing a construction of a square inscribed in a circle, as shown below. What should be the next step in his construction?
Construct a perpendicular bisector to line AB.

Place his compass on the radius and draw two arcs above and below line AB.

Make another circle from point B with the same radius as his original circle.

Draw a line parallel to line AB that touches the circle at point A.

Answer 1

I think it's A

Answer 2

Construct a perpendicular bisector to line AB. it's A

Answer 3

Thanks ! :) Are you sure?