What Are 2D Shapes?

• 2D shapes are flat shapes, like a drawing on a piece of paper.
• They only have length and width, which means they do not have any thickness.
• You can see them, but you cannot pick them up like a toy.

Common 2D Shapes

• Circle: A perfectly round shape with no corners.
• Square: A shape with four straight sides that are all exactly the same size.
• Triangle: A shape with three sides and three pointy corners.
• Rectangle: A shape with four sides where two sides are long and two are short.

What Are 3D Shapes?

• 3D shapes are solid shapes that you can hold in your hand.
• They are "fat" instead of "flat" because they have height, width, and depth.
• These are the shapes we see in the real world every day, like balls and boxes.

Common 3D Shapes

• Sphere: A solid shape that is round like a ball. It can roll in any direction.
• Cube: A solid shape like a block. Every side is a square.
• Cone: A shape that is round at the bottom and has a point at the top, like a party hat.
• Cylinder: A long shape that is round at the top and bottom, like a soup can or a tube.

Shapes Around Us

• The clock on the wall is a 2D circle, but the basketball is a 3D sphere.
• A window is a 2D rectangle, but a brick is a 3D rectangular prism.
• A piece of paper is a 2D rectangle, but a book is a 3D shape.

Lesson Summary

• 2D shapes are flat and have no thickness.
• 3D shapes are solid and take up space.
• Everything we touch and play with is made of different 3D shapes.