MathematicsGeometryAges 9–10
Regular and irregular polygons
Distinguish between regular and irregular polygons based on reasoning about equal sides and equal angles
Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
No reviewed resources for this concept yet.
The teaching approach above still stands. Curated practice links will appear here as the shelf fills.
Explore the learning path
2 before · 4 after
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This concept
Regular and irregular polygonsConceptual concept
Check understanding
- Classify a set of polygons as regular or irregular
- Explain that a regular pentagon has 5 equal sides and 5 equal angles
- Identify that a rectangle is irregular (equal angles but not all equal sides) unless it is a square
“If you show your child a stop sign (regular octagon) and a wonky eight-sided shape, can they explain which is regular and which is irregular — and why?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 9–10