Shapes and lines
Welcome to geometry! That is a big word for something simple — looking at the shapes of things around us. A wheel is round. A book is a rectangle. A roof is often a triangle. Geometry is like a name game for shapes.
Plane shapes
Plane shapes are flat — they live on a piece of paper. There are four most-friendly ones to start with:
- Circle — round, no corners.
- Square — four equal sides, four corners.
- Triangle — three sides, three corners.
- Rectangle — four sides, four corners, two long and two short.
Lines and curves
Apart from shapes, you will see lines too.
- A straight line is exactly that — straight, like a ruler.
- A curve bends — like a smile or the edge of a circle.
Shapes are everywhere
Look around the room. The window is probably a rectangle. The clock might be a circle. The slice of pizza is a triangle. Once you start noticing shapes, you can't unsee them.
What you will learn here
- Plane shapes — the four basics in detail
- Lines and curves — straight, curved, and where to find them
- Finding shapes around us — shape hunting in real life
- For parents — tips for grown-ups
When you are ready, try Name the shape or hunt for shapes in Find the shape in the picture.