Proofs Without Words: Exercises in Visual Thinking

abcd American Mathematical Monthly April ar³ arctan Arithmetic Mean-Root Mean Association of America Ayoub bd-ac calisson College Mathematics Journal cose Dave Logothetti Fouad Nakhli Geometric Series Harmonic Mean-Geometric Mean Howard Eves June Kung The Law Law of Cosines m₁ March Martin Gardner Mathematical Association Mathematics Before 1650 Mathematics Magazine Mean Square Inequality Mean-Root Mean Square Moments in Mathematics n²+n+1 Oblong Numbers Odd Integers positive numbers proofs without words PWWs Pythagorean Theorem Pythagorean Triples RBN Sums Reprinted by permission Richard Courant Right Triangle Roland H Scientific American Sept Sidney H sine sinẞ Solomon W Sums of Consecutive Sums of Cubes Sums of Integers Sums of Oblong Sums of Odd Sums of Squares Sums of Triangular tane Triangular Numbers Trisection y=mx λι Β ΣΣ