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Let's Investigate Triangles

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?

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Seven Sticks

Explore the triangles that can be made with seven sticks of the same length.

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Three Fingers and a Loop of String

Using a loop of string stretched around three of your fingers, what different triangles can you make? Draw them and sort them into groups.

Triangle or No Triangle?

Age 5 to 7 Challenge Level:

You could print off this sheet of the shapes, then cut them out and look at one shape at a time. Try turning the shape round so that it is a different way up.

Think about what you know about triangles - do you think this shape is a triangle? Why? Why not? Explain your ideas to someone else and see if they agree!