2D Shapes
Key Stage: 1 ★
What triangles can you make with the pieces from this construction set?
This problem allows children to make important discoveries about triangles through representing the sides of triangles with strips from a construction kit. They will have the opportunity to find out which combinations of lengths cannot be made into triangles, and why this is so. They should also discover how rigid triangles are, and that three fixed lengths can only be arranged in one way (unlike other polygons such as quadrilaterals where the angles can be changed).
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
Key Stage: 1 ★
What triangles can you make with the pieces from this construction set?
This problem allows children to make important discoveries about triangles through representing the sides of triangles with strips from a construction kit. They will have the opportunity to find out which combinations of lengths cannot be made into triangles, and why this is so. They should also discover how rigid triangles are, and that three fixed lengths can only be arranged in one way (unlike other polygons such as quadrilaterals where the angles can be changed).
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
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