Pythagoras' theorem in two and three dimensions appears in General Mathematics, Units 1-2, section 6 (Geometry and trigonometry: Shape and measurement) in the Victorian Certificate of Education Mathematics Study Design (Victorian Curriculum Assessment Authority, 2010). It also comes in Further Mathematics, Units 3-4 (Applications: Geometry and trigonometry) in the same document. In the UK (and in Australia), students typically meet the two dimensional version when aged around 13-14 and become quite familiar with this before encountering the three-dimensional version later on. Pythagoras' theorem is likely to be a significant element in any secondary mathematics curriculum, and is one of the topics adults frequently recall when talking about their experiences of school mathematics.