Count vertices, edges, and faces

key notes :

📘 Key Vocabulary

• Vertex (Vertices) – A corner where edges meet.
• Edge – A straight line where two faces meet.
• Face – A flat surface of a 3D shape.

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📐 Common 3D Shapes and Their Properties

Shape	Vertices	Edges	Faces
Cube	8	12	6
Rectangular Prism	8	12	6
Pyramid (square base)	5	8	5
Triangular Prism	6	9	5
Cylinder	0	2	3
Cone	1	1	2
Sphere	0	0	1

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🧠 Concepts to Understand

• Vertices are points, like the corners of a box.
• Edges are lines, like the sides of a box.
• Faces are flat parts, like the top, bottom, and sides of a box.
• 3D shapes are made up of these parts.

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🔍 Tips for Counting

• Use your fingers or draw dots at each vertex to count.
• Trace edges with a pencil or finger.
• Count the flat surfaces (faces) one by one.

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🎯 Activities to Practice

• Build 3D shapes using toothpicks and clay.
• Use real-life objects like boxes, cans, or balls.
• Create a 3D shape chart in class.

Learn with an example

let’s practice!