This resource encourages students to explore triangles through a series of thought-provoking questions. Students consider the properties of different types of triangles, including scalene, isosceles and equilateral triangles, and explore how these classifications relate to one another.

The questions also develop students’ understanding of interior angles, including whether triangles can have obtuse angles and whether they can contain more than one obtuse angle. Students are encouraged to explain and justify their thinking rather than simply give an answer.

The resource finishes by challenging students to consider whether a right-angled triangle can also be scalene, isosceles or equilateral, providing opportunities for discussion, reasoning and deeper understanding.