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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.

Overlaps

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2
Try to "see" one shape moving over the other in your mind.
If you want to work away from the computer, you could cut out the shapes in two different colours of tissue paper or cut up two overhead transparencies to test out your ideas. Or, you could try drawing the two shapes overlapping.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.