Using this Geogebra applet will allow students to explore the concept of geometric dilations.

1. What is the value of k when the figure is a reduction?
2. What is the value of k when the figure is an expansion?
3. Based on this information, what does k represent?
4. What happens to the figure when k = 1? Why does this happen?
5. How can we find the value of k if we are only given the lengths of the sides of the figure?