MAA: Math Horizons

			November 2003: 5 Paintings, Tilings, and Proofs Roger Nelsen 9 Knots to You Michael McDaniel 13 Math in the ICU Rhonda J. Hughes 16 Thou Shalt Not Divide By Zero! Eli Maor 20 Circles: Around, About, Across, & Through Rheta N. Rubenstein and Randy K. Schwartz 24 Area & Arc Length of Trochogonal Arches Tom M. Apostol and Mamikon Mnatsakanian 32 Problem Section Andy Liu 35 The Final Exam Thomas Hull Deanna Haunsperger and Stephen Kennedy, Editors