Video Segment
In this segment, participants describe and explain different patterns they found in the toothpick triangles problem, and Professor Cossey discusses the importance of understanding where a pattern comes from. Watch the segment after you have completed the toothpick triangles problems, Problems B1-B4, and consider the different patterns that the onscreen participants identified.

Do Sue-Anne and Frederick's rules extend the table in the same way? Is there only one correct way to extend the table in Problem B2?

You can find this segment on the session video, approximately 14 minutes and 10 seconds after the Annenberg Media logo.