Flat 2D shapes
2D shapes are flat shapes we can draw on paper. Here are four to know.
- Square – 4 equal sides.
- Rectangle – 4 sides, like a door.
- Triangle – 3 sides and 3 corners.
- Circle – round, with no corners.
Key idea
To name a flat shape, count its sides and corners.
Counting sides
Worked example
A shape has 3 straight sides and 3 corners. It is a triangle.
Remember
- Square and rectangle have 4 sides.
- Triangle has 3 sides.
- Circle has no corners.