Let be the midpoint of the arc . Pick at random and pick such that (where denotes perpendicular). Then
Archimedes' Midpoint Theorem
See also
MidpointExplore with Wolfram|Alpha
References
Honsberger, R. More Mathematical Morsels. Washington, DC: Math. Assoc. Amer., pp. 31-32, 1991.Honsberger, R. Episodes in Nineteenth and Twentieth Century Euclidean Geometry. Washington, DC: Math. Assoc. Amer., pp. 1-2, 1995.Referenced on Wolfram|Alpha
Archimedes' Midpoint TheoremCite this as:
Weisstein, Eric W. "Archimedes' Midpoint Theorem." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ArchimedesMidpointTheorem.html