Geometry: Similarity Paradigm Lab

To start our unit on similarity in geometry we started with a review of isometries from first semester and then moved on to using “rubber band stretchers” to create dilated images of given figures.

Idea modified from here

2015/01/img_1142.jpg

2015/01/img_1141.jpg

After they completed their figures they were instructed to measure different sides and angles and try to determine a pattern for each.

Many were quick to see that the angles remained the same, but it took a little coaching for them to piece together the pattern occurring with the sides. I think this was primarily so because students kept tending to measure only one pair of sides and not explore the others.

Now if I could just figure out how to decrease the number of wayward, projectile bands from groups who finish quickly.

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