Flat vs Solid Shapes

How to tell they’ve got it

Tick these off as you see them — no test required.

Sort shapes into 'flat' and 'solid' groups
Explain that a circle is flat but a sphere is solid
Identify whether a given shape is 2-D or 3-D

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Try this together

Does your child understand the difference between a flat shape like a square and a solid shape like a cube — and can they sort everyday objects into flat or solid?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

2-D shapesages 4–6Distinguishing 2-D from 3-D requires knowing what 2-D shapes are

3-D shapesages 4–6Distinguishing 2-D from 3-D requires knowing what 3-D shapes are

Flat vs Solid Shapesthis skill · ages 5–6

Unlocks

2-D faces on 3-D shapesages 6–7Must understand the distinction between 2-D and 3-D to recognise 2-D shapes on 3-D surfaces

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

Show candidate curriculum codes · 3 ACARA · 2 NSW · 2 VIC

Australian Curriculum v9 candidate

AC9M2SP01medium confidenceYear 2 · Space

recognise, compare and classify shapes, referencing the number of sides and using spatial terms such as “opposite”, “parallel”, “curved” and “straight”

AC9MFSP01low confidenceFoundation · Space

sort, name and create familiar shapes; recognise and describe familiar shapes within objects in the environment, giving reasons

AC9M1SP01low confidenceYear 1 · Space

make, compare and classify familiar shapes; recognise familiar shapes and objects in the environment, identifying the similarities and differences between them

NSW syllabus codes & stages only

MAE-2DS-01medium confidenceMathematics K-10 · Early Stage 1

MAE-2DS-02medium confidenceMathematics K-10 · Early Stage 1

Victorian Curriculum 2.0 codes & levels only

VC2M2SP01medium confidenceMathematics · Level 2 · Space strand

VC2MFSP01low confidenceMathematics · Foundation · Space strand

These are candidate alignments generated by semantic matching — machine-suggested and unreviewed (v0.1), not official or verified mappings. For official curriculum content see australiancurriculum.edu.au, curriculum.nsw.edu.au and f10.vcaa.vic.edu.au. Don’t rely on them for registration or compliance purposes.

Nearby on the map

3-D shapes (age 5+)ages 5–6 Building & Drawing Shapesages 5–6 Combining Simple Shapesages 5–6 Turns & Directionsages 5–6

All Geometry skills →