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### Number and algebra

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### Probability and statistics

### Working mathematically

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### For younger learners

# Nine-pin Triangles

How will you record the triangles you've made? You might like to print off this sheet to use.

You could try drawing triangles which have a side made by joining two pegs next to each other. How many different triangles can you make in this way?

How will you know when you've got them all?

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Age 7 to 11

Challenge Level

- Problem
- Getting Started
- Student Solutions
- Teachers' Resources

How will you record the triangles you've made? You might like to print off this sheet to use.

You could try drawing triangles which have a side made by joining two pegs next to each other. How many different triangles can you make in this way?

How will you know when you've got them all?

Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?

Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?