If your table doesn't look like mine, I probably didn't explain it very well, so send me an e-mail about what I should have told you that I didn't, then I'll send you a gold star too. Then if we put in 25, we'd need to put in 50, and 75, and 100, and on and on. But the table for rotating the square is finished. The table tells the whole story. Combining any motion with STAY PUT doesn't change it.
Every motion has an opposite .
There's more to say about this, but first I want to experiment with a rectangle. So stop now for a few minutes and build yourself a model like this rectangle. But before you go, you need to know that we're going to being flipping the rectangle over, so when you build it, the red corner has to be red on both sides, front and back, and the same for the other three corners. Okay, here's the new model. See you back here in a few minutes.