Stage: 2 Challenge Level: 
You might find it useful to print off this sheet of blank 3 by 3 grids.
Alternatively, you could use the Virtual Geoboard .
You could try drawing all the triangles you can from one spot to start with.
Interactivities. Mixed triangles. Addition & subtraction. To be developed. Visualising. Investigations. Practical Activity. Pinboard/geoboard. Working systematically. Combinations.
Published March 1998.
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