Makayla is teaching Rodney how to construct a square inscribed in a circle. I need help Makayla says Rodney should draw diameter AB, and then use a compass and a straightedge to find chord CD that bisects diameter AB. Makayla also tells Rodney he should use a straightedge to draw the four chords that make up the square: chords AC, AD, BC, and BD.

What error, if any, is Makayla making in her instructions to Rodney?