Playing around with mrzcasali's:
[url]http://www.geogebratube.org/material/show/id/33383[/url]
I had to make a new version of my own.
The shapes are made with the rigid polygon tool. One thing I didn't put in was the ability to flip the tiles. dhabecker has the most elegant flipping I've seen on his pentominoes:
[url]http://www.geogebratube.org/material/show/id/108136[/url]
