Let's Investigate Triangles
Stage: 1 Challenge Level: 
Have you made triangles with all the sides the same colour?
Have you made triangles with all the sides different colours?
Have you found three sticks you can't make a triangle with?
This sheet will give
you four copies of each strip in the colours in the problem, which
you could print off and cut out.
Published September 2001,May 2009.