Modernizing Proof Teaching through Viviani's Theorem

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  • 1 Norwich University, Northfield, VT

Valid proofs need not be in the traditional two‐column format. This classroom activity allows students to explore, discuss, and use specialized facts to create a general statement of truth.

Supplementary Materials

    • Viviani Project GGB (Data File 12.7 KB)

App 1

Mathematics Teacher: Learning and Teaching PK-12
  • Kawasaki, Ken‐ichiroh. 2005. “Proof without Words: Viviani's Theorem.” Mathematics Magazine 78, no. 3 (June): 213.

  • Sears, Ruthmae, and Oscar Chávez. 2014. “Opportunities to Engage with Proof: The Nature Proof Takes in Two Geometry Textbooks and Its Influence on Enacted Lessons.” ZDM: The International Journal on Mathematics Education 46, no. 5 (October): 76780. doi: 10.1007/s11858‐014‐0596‐9.

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  • Wolf, Samuel. 1989. “Proof without Words.” Mathematics Magazine 62 (3): 190.

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