# Stage 3, mathematics, Year A – Unit 12

This 2-week, Year A unit introduces the big idea that understanding relationships between the properties of 2D shapes helps visualise and organise spaces in the world.

## Syllabus

Syllabus outcomes 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.

Students are provided opportunities to:

• explore, describe and classify triangles and quadrilaterals according to their properties
• investigate the symmetry properties (line and rotational) of triangles and quadrilaterals
• establish an understanding of the relationship between the properties of 2-dimensional shapes, area and perimeter.

### Syllabus outcomes and content groups

Multiplicative relations A – MAO-WM-01, MA3-MR-01

• Determine products and factors
• Use partitioning and place value to multiply 2-, 3- and 4-digit numbers by one-digit numbers
• Use estimation and rounding to check the reasonableness of answers to calculations

Multiplicative relations B – MAO-WM-01, MA3-MR-01

Select and apply strategies to solve problems involving multiplication and division with whole numbers

Two-dimensional spatial structure A – MAO-WM-01, MA3-2DS-01, MA3-2DS-02

• 2D shapes: Classify two-dimensional shapes and describe their properties
• Area: Use hectares and square kilometres as units of measurement for area
• Area: Calculate the areas of rectangles using familiar metric units

## Resource

Category:

• Mathematics (2022)
• Multiplicative relations
• Stage 3
• Two-dimensional spatial structure
• Unit