Double-click on the movie to PLAY.

Click once to PAUSE.

RELOAD the page or double-click to return to the START of the movie.

Then shear P

Here shear P (with another slanting invariant line through D) is applied to the image of square ABCD (ie after shear N).

What shape and size is the resulting image? How far has point A' (the first image of A) moved?
What is the shear factor for shear P?

The movie on the next page combines the first two movies, ie it shows the effect of N followed by P.