Reflections with diagonal axes

What you'll learn

1. 1

   Imagine folding a piece of paper along a slanted line — like a diagonal fold!

2. 2

   What does a reflection do to a shape?

3. 3

   Here's a shape and a slanted mirror line. See how each point flips to the other side?

4. 4

   Let's reflect this triangle over the diagonal line together!

5. 5

   Flip this shape over the slanted line! Tap where each corner should go.

6. 6

   If a point is at (2,4) and you reflect it over the diagonal line y=x, where does it go?

7. 7

   What happens to the shape's size when you reflect it over a diagonal?