Once the key of reality was walking down the path of questions to go see an old friend.When he was walking down a loud voice said " Stop ! To continue you have to do the following "
A stick came out and a giant compass " you must duplicate a segment" said the voice. After he finished the voice said " duplicate an angle" . The key succeed but he also have to do bisect an angle, construct the perpendicular bisector of a segment, construct the perpendicular from a point to a line , construct a perpendicular from a point on a line, and construct a parallel line through a point not on a line. After he was all done the voice was amazed, he also informed him that this helped him build his bridge.