Flat Shapes and 3D Friends
Did you know that every 3D shape is made up of flat shapes?
Planar figures (like squares, circles, and triangles) are flat shapes that live in 2D world. Solid
figures (like cubes, spheres, and pyramids) are 3D shapes that live in our world! The flat surfaces of
3D shapes are called faces, and they're made of 2D shapes.
How They Connect
1️⃣ Faces: The flat surfaces of 3D shapes are 2D shapes
2️⃣ Edges: Where two faces meet is a line (edge)
3️⃣ Vertices: Corners where edges meet are points
Let's Explore Together!
Example 1: Shape Match Game
Can you match the 3D shape to its 2D faces? Click on a 3D shape to see its flat friends!
Cube
Pyramid
Cylinder
The has these faces:
Example 2: Net Explorer
A "net" is what we call a 3D shape when it's unfolded flat. Which of these nets can fold into a cube?
Option 1
Option 2
Parent Tips 🌟
- Shape Hunt: Go on a shape scavenger hunt at home - find objects that match different 3D shapes and identify their faces
- Play Dough Fun: Use play dough to make 3D shapes and then press them flat to see their 2D faces
- Building Blocks: When playing with blocks, point out how the flat surfaces (faces) come together to make 3D shapes