Choosing the right resources to support the learning of polygons

Geometry, from Greek meaning 'earth measure', is a formal study of the properties of shape and objects and their relative position in space. Geometric knowledge is the key to succeeding in science, technology, engineering, and mathematics disciplines (Wai, Lubinski, & Benbow, 2009). It is also needed when pursuing leisure activities such as designing a garden, engaging in craft work, comprehending maps, and making decisions involving measurement situations. An important benefit of learning geometry is the ability to support visualisation, spatial reasoning, critical thinking and deductive reasoning (Jones, 2002). In a world that is bombarded by images, being able to reason spatially and critically is essential to navigate the space we live in and engage in civic affairs. As reflected in The Australian Curriculum: Mathematics (Australian Curriculum Assessment and Reporting Authority (ACARA), n.d), numeracy is no longer confined to having number sense but includes data, spatial and measurement sense. This article explores some of the key ideas involved in learning about two dimensional shapes and discusses how materials can be used to support learning.