Visual Computation of Three Geometric Sums

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W. Page, "Proof without Words: Geometric Sums," Mathematics Magazine, 54(4), 1981 p. 201.
R. Mabry, "Mathematics without Words," The College Mathematics Journal, 32(1), 2001 p. 19.
R. Mabry, "Proof without Words: ," Mathematics Magazine, 72(1), 1999 p. 63.
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Related Curriculum Standards

US Common Core State Standards, Mathematics