Using a loop of string stretched around three of your fingers, what
different triangles can you make? Draw them and sort them into
Age 5 to 7 Challenge Level:
How is the starting triangle split? Can you cut your
own triangle in the same way?
What happens to the new shapes then?
You can always pause the film at any point so you can look
carefully at the images.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice.