Identify the correct statement with regard to introducing the concept of triangles at primary level.

At the primary level, geometry teaching follows the van Hiele level of visualization. Children should be exposed to a variety of shapes including all types of triangles along with other figures so that they can compare, contrast, and identify the defining features of a triangle. Restricting them to only one type or avoiding other figures hinders concept formation, and formal definitions should emerge from exploration rather than being given first.