The document contains an agenda for a Dec. 6, 2010 class. It includes checking homework, introducing a new unit on problem 1.1, and doing a rubber band activity with computers to look at similar figures and how side lengths and areas change when the size of the figures are changed. Students will use Geometer's Sketchpad and a program called Rubberband to explore what stays the same and what changes for figures that are enlarged but maintain the same basic shape.

1. Agenda Dec. 6, 2010 Homework check homework 12 S&S p. 12 # 1, 2, 10, 12, 14 - 16 Introduction to unit Problem 1.1 Rubberband activity with computers - maybe Daily Scribe Mon. Tues. Wed. Thurs. Fri.

2. 8 9

3. area perimeter

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11. Log on to students Go to: ·my computer ·PMS 7th Grade Common ·Favazza ·Geometer's Sketchpad ·Rubberband (the one with the yellow shapes icon)

12. Similar figures What stays the same? What changes? . star-5 triangles -same basic shape 2 times the size -image side lengths are about 2 times longer than original. -area of image is four times the area of the original