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 N

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

The resulting image is a rectangle. What can you say about its dimensions and its area?

How far has point B' (the first image of B) moved under shear N?
What is the distance of B' from the invariant line n?
So what is the shear factor for shear N?

You can explore the shear further using this JAVA worksheet: JAVA-shear-N.

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