🔢 Mathematics · Geometry

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)

Typical age: 6–7 years

“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?”

0 / 3 mastered

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Needs first

2-D shapesREQUIRED
Distinguishing defining vs non-defining attributes requires knowing common 2-D shape names first
3-D shapes (age 5+)REQUIRED
Identifying defining attributes builds on informal analysis and comparison of shapes

Unlocks next

2-D shapes (age 6+)
Understanding defining attributes supports describing shape properties formally
Angles in triangles (age 7+)REQUIRED
Drawing shapes by attributes extends understanding defining vs non-defining attributes