One Big Triangle

Stage: 1 Challenge Level: Challenge Level:1

Make one big triangle so the numbers that touch on the small triangles add to $10$.

You can click on the small coloured triangles and then drag them into the large empty triangle.

Full screen version

This text is usually replaced by the Flash movie.

You can also print out these triangles, cut them out and rearrange them to make the big triangle.


Published April 2001,March 2009,April 2009.