Imagine you have a piece of paper with a simple picture drawn on it. Now, you can fold the paper in half down the middle of the picture so that one side is on top of the other side. If the picture looks exactly the same on both sides of the fold, your picture has "reflection symmetry"!
It's like having a mirror that divides your picture in half, and both halves look exactly the same. It's very cool because it means your picture is perfectly balanced from one side to the other. This type of symmetry can be found all around us - in nature, art, and even in architecture. It's like having a twin that looks exactly like you, but mirrored!
So, reflection symmetry is when a shape or image has a line through it and both sides are a perfect mirror image of each other. It's kind of like looking in a mirror, where whatever you see on one side is reflected perfectly on the other side. It's a cool way to make things look balanced and pleasing to the eye.