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### Number and algebra

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### Working mathematically

### For younger learners

### Advanced mathematics

# Shapely Lines

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### Let's Investigate Triangles

Links to the University of Cambridge website
Links to the NRICH website Home page

Nurturing young mathematicians: teacher webinars

30 April (Primary), 1 May (Secondary)

30 April (Primary), 1 May (Secondary)

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Age 5 to 7

Challenge Level

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

You could write the number of sides a shape has inside it so you
don't have to keep counting.

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?