This sketch dilates the preimage to the image, and asks you to find the center. (And in challenge mode, the scale.)[br][br]Score up to 100 for placement, with possible bonuses up to 100.[br]In Challenge Mode, you can score up to another 100 by guessing the scale: but caution - negatives are possible. (Hit enter after entering a scale.)[br][br]Tweet or email screenshots of high scores to @mathhombre or goldenj@gvsu.edu.

More GeoGebra (and games) at [url]bit.ly/mh-ggb[/url]