 Let us look at some basic isometries. There are three basic isometries. Translations, also called sliding, rotations, also called turning around. And reflections are also called flipping. There are vertical reflections and horizontal reflections. These get a little confusing because a vertical reflection is when you reflect along a horizontal line. So a vertical reflection, you have, say, this picture and you reflect it along a horizontal line. And we call it a vertical reflection. We're going from here to here. And then if you have a horizontal reflection, these are vertical reflections. But horizontal reflections, you reflect along a vertical line. If you have this here, so you reflect along a vertical line and you get something like that. Let us see how we get from the left picture to the right picture. What I'm going to do is to select the left foot. I'm going to copy it. I'm going to paste it. When I paste it, I have it here and I can do several things. I can rotate it to the left or I can rotate it to the right. Or I can rotate it 180 degrees or I can do a vertical flip. Oh, notice a vertical flip. A vertical flip does the trick in this particular case. If we put it here, say we put it here and now we bring another copy and we do the vertical flip here. There we go. That's much better, right? Great. So you can play with paint and create exams or if you're a student, you can just play with this and look at what happens when you do those rotations, especially when the shape is irregular. These feet are like this Tarheel foot. A very nice symbol in the Tarheel state of North Carolina.