Peter,

Some of them were pretty easy to find (The Pentagon, the basketball stadium at the college I graduated from, rectangles).

But, yeah, some of them were pretty difficult to find. The hexagon buildings took awhile.

I did a google search for something like "hexagon building." It actually comes up with quite a few results. The hard part was finding the good results: address of the actual buildings, then finding ones that had higher resolution images.

It pretty much just took time. But, now I can use it in my classroom every year for as long as I need to (and anyone else can use it too), and it is more engaging for the students then just a worksheet. I have a 1:1 computing environment in my classroom so I break it down to the individual folders and have my students work on them one at a time over a few weeks. By about the third folder all of them seem to know what they're doing .

What does this all mean? Share your stuff on here. If you use mine I want to use yours so I don't have to spend that much time on each lesson... ha ha.

Edit: I also searched the forums quite a bit for keywords like circles, hexagons, pentagons, octagons..