# Stage 3, mathematics, Year A – Unit 03

This unit develops the big idea that what needs to be measured determines the unit of measurement.

Students are provided with opportunities to:

• measure and compare lengths of objects using millimetres, centimetres, metres and kilometres
• measure, create and compare perimeters of two-dimensional shapes
• represent and read analog, digital, 12-hour and 24-hour time.

### Syllabus focus and content groups

Geometric measure A – MAO-WM-01, MA3-GM-02

• Length: Use metres and kilometres for length and distances
• Length: Measure lengths to find perimeters

Geometric measure B – MAO-WM-01, MA3-GM-02

• Length: Connect decimal representations to the metric system
• Length: Solve problems involving the comparison of lengths using appropriate units

Two-dimensional spatial structure A – MAO-WM-01, MA3-2DS-01

2D shapes: Classify two-dimensional shapes and describe their properties

Two-dimensional spatial structure B – MAO-WM-01, MA3-2DS-01

2D shapes: Dissect two-dimensional shapes and rearrange them using translations, reflections and rotations

Non-spatial measure A – MAO-WM-01, MA3-NSM-02

Time: Compare 12- and 24-hour time systems and convert between them

Non-spatial measure B – MAO-WM-01, MA3-NSM-02

Time: Solve problems involving duration, using 12- and 24-hour time

## Syllabus

Syllabus outcomes and content descriptors from Mathematics K–10 Syllabus (2022) © NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales, 2024.

Category:

• Geometric measure
• Mathematics (2022)
• Non-spatial measure
• Stage 3
• Two-dimensional spatial structure
• Unit