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 ...

I LOVE symmetry photography in my portrait, landscape and architectural work. Is it better than the rule of thirds?

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.

Ask "What is a triangle?". 2. Using Sketchpad, create a variety of shapes (examples and non-examples of triangles). Begin with open and closed shapes, and shapes with or without straight sides.