Perimeter (age 10+)
Recognise that shapes with the same area can have different perimeters and vice versa; explore this relationship systematically
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Perimeter (age 10+) means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Paper shapes or a ruler and pencil; Shape name cards. Adult traces or shows one shape and names a property (sides/angles). Child identifies three shapes or measures one simple property and records it. Done: three correct shape/property responses. Stop after the fresh check; keep optional challenge for another day.
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BBC Bitesize · Practice link — not the full lesson
KS3 Maths
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KS3 Maths supports Perimeter (age 10+). An adult previews and guides; this is a learning page, not a scored quiz.
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Source, access and review notes
Public BBC Bitesize page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
BBC Bitesize. “KS3 Maths.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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Check understanding
- Draw two rectangles with area 24 cm² but different perimeters
- Find two shapes with perimeter 20 cm but different areas
- Explain why a long thin rectangle and a square can have the same area but different perimeters
“If your child has 12 square tiles to arrange, can they make different-shaped rectangles and notice that the area stays the same (12 tiles) but the perimeters are all different?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 10–11
Standards