The first error Rafael made was dividing the circle into 8 equal segments
A square is constructed by first dividing the circle into 4 equal parts
How to determine the error
One error Rafael have made is related to the division of the circle into six equal arcs.
For a square inscribed in a circle, the correct procedure involves dividing the circle into four equal arcs, not six.
Each arc corresponds to 90 degrees, as a square has four 90-degree angles.
360 / 4 = 90 degrees
To correct this error, Rafael should divide the circle into four equal arcs, each measuring 90 degrees