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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?

Seven Sticks

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

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.

Animated Triangles

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.