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.
