National Council of Teachers of Mathematics 2012 Annual Meeting and Exposition

Please note: The NCTM conference program is subject to change.

554- Special Triangles from the Golden Triangle and Ailles' Rectangle

Friday, April 27, 2012: 2:00 PM-3:00 PM
Salon D (Marriott Downtown)
Lead Speaker:
Margot N. Calcut
Jack S. Calcut

  • 554_Calcut_Special_Triangles.pdf (641.3 kB)

  • Using Ailles' rectangle, the golden triangle, and high school geometry, construct a complete list of all the special triangles that have rational angles and sides with at most one square root. The list is finite, similar to that of the Platonic solids. Collect some great problems with which to challenge your students.

    Presentation Format: 9-12 Session
    Grade Band Audience: 9 to 12

    See more of: 9-12 Session
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