Clone of Matching Triangles

These triangles belong to three different families.

All the triangles in the same family are the same shape.

But they may not be the same size or the same way up.

Can you sort them out and explain how you did it?

You may want to use this interactivity to sort the triangles:

This text is usually replaced by the Flash movie.

Or you could print off NEW one sortTri.pdf of the triangles, then cut them out and sort them practically.