Proof Without Words: The Square of a Balancing Number Is a Triangular Number

By Jones Michael A.  

The College Mathematics Journal, Vol. 43, Iss. 3, 2012-05 ,pp. : 212-212

Mathematical Association of America

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Proof Without Words: Steiner's Problem on the Number e

By Nelsen Roger B.  

Mathematics Magazine, Vol. 82, Iss. 2, 2009-04 ,pp. : 102-0

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Proof Without Words: Every Octagonal Number Is the Difference of Two Squares

By Jakubowski Elizabeth   Unal Hasan  

Mathematics Magazine, Vol. 82, Iss. 3, 2009-06 ,pp. : 225-225

Mathematical Association of America

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Proof Without Words: Alternating Sum of an Even Number of Triangular Numbers

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Mathematics Magazine, Vol. 80, Iss. 1, 2007-02 ,pp. : 76-76

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Proof Without Words: Sums of Every Third Triangular Number

By Nelsen Roger B.  

The College Mathematics Journal, Vol. 46, Iss. 2, 2015-03 ,pp. : 98-98

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