Year 4 - Spatial Reasoning: Triangle Inequality (Trial)

Summary of learning goals

This task explores the triangle inequality theorem. Students use twenty matchsticks to create different triangles. Using twenty sticks, it is only possible to make eight different triangles. They will learn that that, in any triangle, the sum of the lengths of any two sides must be greater than the length of the remaining side. Students are asked to represent inequalities using greater than and less than symbols.