Reflection group

Hi there! Do you know what a reflection is? It's like looking at your face in the mirror and seeing your reflection back at you. Now imagine you have a shape that you want to reflect, like a square. You can draw a line down the middle of the square and flip one side over onto the other side. This is called a reflection.

Now let's talk about a group of reflections. A reflection group is a group of reflections that you can use to transform one shape into another shape. For example, if you have a triangle and you want to transform it into a different triangle, you can use a reflection group to do it.

But here's the tricky part - not all reflection groups are the same. Some reflection groups have more reflections than others, and they can create different shapes. Some reflection groups can even make really cool patterns and designs.

So, a reflection group is just a special kind of group that uses reflections to transform one shape into another shape. It's like using a bunch of mirrors to create cool patterns and designs. Cool, huh?