Count vertices, edges, and faces

Key Notes:

🔷 What are 3D Shapes?

• 3D shapes are solid objects (they have length, width, and height).
• Examples: cube, cuboid, sphere, cone, cylinder.

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🔹 Vertices (Corners)

• A vertex (plural: vertices) is a corner point.
• Where edges meet.
• Example: A cube has 8 vertices.

👉 Easy tip: “Corners = Vertices”

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🔹 Edges (Lines)

• An edge is a line where two faces meet.
• Example: A cube has 12 edges.

👉 Easy tip: “Lines = Edges”

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🔹 Faces (Flat Surfaces)

• A face is a flat surface of a shape.
• Example: A cube has 6 faces.

👉 Easy tip: “Flat sides = Faces”

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🔸 Examples of Shapes

Shape	Vertices	Edges	Faces
Cube	8	12	6
Cuboid	8	12	6
Cone	1	1	2
Cylinder	0	2	3
Sphere	0	0	1 (curved)

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🌟 Teaching Tips

Use real objects (dice, box, ball, can).

Let students touch and count.

• Ask questions like:
• “How many corners can you see?”

“How many flat sides?”

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🎯 Simple Summary

• Vertices = Corners
• Edges = Lines
• Faces = Flat surfaces

Learn with an example

let’s practice! 🖊️