Problem II

Problem II: Given a straight line with endpoints A, B, to bisect it.

Construction:   Take any point C at random away from the line AB, and from A through C draw the indefinitely long line ACD, and locate on that line CD equal to the double of AC, and from D through B make a straight line.  In that line, put BE equal to BD, and, joining C, D, I say it bisects AB at F.

Branch point

              The other eight problems