Can you split each of the shapes below in half so that the two parts are exactly the same?

A generic circular pegboard resource.

Take it in turns to make a triangle on the pegboard. Can you block your opponent?

Inside Triangles

Here is a four by four dotty grid:

I have joined three dots on the grid to make a triangle which has one dot inside it:

triangle with one dot inside

How many different triangles with one dot in the middle can you draw?

How do you know have found them all?

You may like to experiment with the pegboard interactivity below, or you could print off this page of dotty grids to work on.

This text is usually replaced by the Flash movie.