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You might find it useful to print off this sheet of blank 3 by 3 grids.
Alternatively, you could use a virtual geoboard.
You could try drawing all the triangles you can from one spot to start with.
Tri.'s
Age 7 to 11
Challenge Level 
You might find it useful to print off this sheet of blank 3 by 3 grids.
Alternatively, you could use a virtual geoboard.
You could try drawing all the triangles you can from one spot to start with.
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Cutting Corners
Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
Bracelets
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
Tessellating Triangles
Can you make these equilateral triangles fit together to cover the paper without any gaps between them? Can you tessellate isosceles triangles?