Nine pin triangles

Great problem solving activity with an interactive link.Thanks

This has saved me so much time and planning, and has been a great way of incorporating more problem solving in, what could have been a boring 'identify the triangles' type of lesson! Lots of APP evidence will definitely come from pupil talk in this lesson. There's also a quadrilaterals lesson in the same format as this on the website, which is more open - ended in solution.

printable, computer pegboard, and extension questions included.