ACARA AC9M7SP04, Algorithms to sort shapes

Year 7 · Space

Design and describe step-by-step algorithms that sort and classify shapes by their attributes.

Below are free printable maths worksheets that support AC9M7SP04. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.

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Deliver a whole lesson on AC9M7SP04 from a textbook-grade teaching unit, with a hook, worked examples, diagrams, misconceptions, and an exit ticket.

Algorithms and networks: computational thinking in geometry

Year 7-10 (ages 12 to 16)

Teaching guide

What students learn

Design and describe step-by-step algorithms that sort and classify shapes by their attributes.

How to teach it

Write the sorting rule as a clear sequence of yes/no questions (for example 'does it have 4 sides?'), test it on real shapes, and trace how each shape moves through the steps.

Worked example

Describe an algorithm for checking if two triangles are congruent by SSS.

Answer: Measure all three sides of each triangle, then compare the two sets of side lengths for an exact match

Generated and checked in code, so it is correct.

Watch out for

Overlapping or incomplete questions that leave a shape with no path, and steps written in an order that changes the outcome.

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Grade 7 Space

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More Year 7 Space codes: AC9M7SP01 · AC9M7SP02 · AC9M7SP03

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Australian Curriculum content descriptions (c) ACARA, used under CC BY 4.0. Descriptions are paraphrased. See australiancurriculum.edu.au.