Angles in triangles (age 6+)
Distinguish defining attributes of shapes (e.g. triangles are closed and three-sided) from non-defining attributes (e.g. colour, orientation, overall size)
Teaching approaches
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1 approach
Does your child understand that what makes a shape a triangle is having 3 sides and 3 corners — not its colour or which way it's pointing?
Distinguish defining attributes of shapes (e.g. triangles are closed and three-sided) from non-defining attributes (e.g. colour, orientation, overall size)
Learning resources
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This concept
Check understanding
- Build and draw shapes that possess defining attributes
- Identify that a shape remains a triangle regardless of its size, colour, or orientation
- Explain why a given shape is or is not a particular type based on its defining properties
“Does your child understand that what makes a shape a triangle is having 3 sides and 3 corners — not its colour or which way it's pointing?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 6–7
Standards