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: TimesSquareBall2021.pdf
CCSS: 7.G.A.3, 7.G.B, 8.G, HSG.GMD.B.4
You can use our short video to demonstrate truncation.
For members we have an editable Word docx and solutions with diagrams.