This means you can draw a mirror line down through the middle of each shape ... to see examples of a mirror line. This pattern is made of squares. The finished pattern has vertical symmetry.

Angela: Wow, girls, this looks amazing! That's a perfect example of reflective symmetry. I'm going to take a photograph of it. A 2D shape is symmetrical if you can draw a line through the middle ...

It is the shape of your data ... the same to the left and right of the center point. For example, the normal distribution is a symmetrical distribution where the three measures of central tendency ...