Similar Figures

In the following sketch  B'C'D'E'F' is the image if BCDEF after a size change of magnitude 2.  

Point Z is the center of the size change.  

How does the length change under a size change of magnitude 2?  

How does the area change?

Drag any of the points to explore size changes and similar figures.

Tessellations

Grab and drag any of the points to change the tiling of the plane.

Reflections

Triangle A'B'C' is a reflection of triangle ABC.

Drag a Vertex of triangle ABC to see its 

image when reflected over the center line.