Ontario K–8 curriculum · Glossary

two-dimensional shape

Definition

A two-dimensional shape is a flat shape, like a drawing on paper, that only has a length and a width, but no thickness.

A square drawn on a piece of paper is a two-dimensional shape because it's flat.

How to teach this in 30 seconds

Try this analogy: A two-dimensional shape is like a drawing on a piece of paper — it's flat.

Ask your child: Can you trace this shape with your finger?

Common mix-up: Kids often confuse flat shapes with solid objects, like calling a ball a circle. A two-dimensional shape is something you can draw on a flat piece of paper.

Examples

  • A circle drawn in the sand at the beach.
  • A triangle cut out of construction paper.

two-dimensional shape is a term used in Ontario’s Kindergarten to Grade 8 curriculum.

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The descriptions on this page are SmartStudy’s own original, plain-language writing — not the Ministry’s wording. They are aligned to the Ontario Curriculum, © King’s Printer for Ontario. For the Ministry’s official wording, see the source link below. SmartStudy is an independent service and is not affiliated with, endorsed by, or sponsored by the Government of Ontario or the Ministry of Education. Ontario Curriculum and Resources ↗