# Stage 1, mathematics, Year A – Unit 05

New shapes can be made by joining (combining) or partitioning (breaking apart) existing shapes – this unit develops student knowledge, understanding, and skills in the attributes and features of two-dimensional shapes.

In this unit, students will learn to:

• explore how shapes can be made by joining (combining) and breaking apart (partitioning) existing shapes
• classify shapes based on their attributes as that shape (features of triangles, circles, squares, rectangles, quadrilaterals, hexagons, octagons, polygons)
• manipulate shapes and objects to halve them in different ways. Sometimes, halves are made up of more than one part
• create new shapes by adding or removing sides and vertices (corners)
• explore how two-dimensional (2D) shapes can be classified into different categories according to their features
• create linear patterns with shapes that transform (slide and reflections)
• make designs which have a line of symmetry.

### Syllabus focus and content groups

Representing whole numbers A – MAO-WM-01, MA1-RWN-01, MA1-RWN-02

• Use counting sequences of ones with two-digit numbers and beyond
• Represent numbers on a line

Combining and separating quantities A – MAO-WM-01, MA1-CSQ-01

Recognise and recall number bonds up to ten

Geometric measure A – MAO-WM-01, MA1-GM-01, MA1-GM-02, MA1-GM-03

• Length: Measure the lengths of objects using uniform informal units
• Length: Subdivide lengths to find halves and quarters

Two-dimensional spatial structure A – MAO-WM-01, MA1-2DS-01, MA1-2DS-02

• 2D shapes: Recognise and classify shapes using obvious features
• 2D shapes: Transform shapes with slides and reflections
• Area: Measure areas using uniform informal units

Two-dimensional spatial structure B – MAO-WM-01, MA1-2DS-01, MA1-2DS-02

2D shapes: Represent, combine and separate two-dimensional shapes

## 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:

• Combining and separating quantities
• Forming groups
• Geometric measure
• Mathematics (2022)
• Representing whole numbers
• Stage 1
• Two-dimensional spatial structure
• Unit