The Times Square Ball


It's a gorgeous ball, covered with Waterford Crystal triangles, shaped as a geodesic icosahedron.  Every New Year's Eve it descends in Times Square to mark the beginning of the new year.  Students can take a closer look at this construction and use our drawings to experiment with slicing an icosahedron in order to discover how this shape is formed.

The activity: TimesSquareBall2023.pdf

CCSS: 7.G.A.3, 7.G.B, 8.G, HSG.GMD.B.4

You can use our short video below to demonstrate truncation.

For members we have an editable Word docx and solutions with diagrams.

TimesSquareBall2023.docx    TimesSquareBall-solution2023.pdf


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