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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.

Shapely Lines

Stage: 1 Challenge Level: Challenge Level:1

Here are some photos sent to us by  children at Aycliffe Drive Primary School:

Jonathan's picture:

Jonathan's Key:

  • Quadrillaterals are blue; I know this because they have 4 sides.
  • Right angle triangles are light brown; they have one right angle, 3 sides and 3 angles.
  • Scalene triangles are pink; I know this because I went on the computer and found out a scalene triangle has 3 unequal sides and 3 angles.
  • Irregular pentagons are black; they have 5 unequal sides and angles.
  • Obtuse triangles are green; these are triangles with one obtuse angle.
 
Other pictures sent into us by Callum and Chloe at Aycliffe Drive Primary School:
 
 
Great use of colours and patterns to differentiate between triangles, quadrilaterals and pentagons. 
 
  

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.