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Prisms and Pyramids: Count Faces, Edges and Vertices

🧊 3D Shapes & NetsAge 8-10MediumShapes🇺🇸 3rd–4th Grade🇬🇧 Year 3–5🇦🇺 Year 3–4🇮🇳 Class 3–4📐 2.G.A.1📐 6.G.A.4

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Prisms and pyramids are everywhere, from a tent shaped like a triangular prism to a box of sweets shaped like a cuboid. In this free online activity, children look at clear pictures of 3D shapes and answer questions about their faces, edges and vertices. Each question shows one shape, so kids can count carefully instead of guessing.

The quiz is perfect for learners aged 8 and above who already know shape names and are ready for shape properties. It works well for home practice, maths revision or a quick warm-up in class.

How to play

  1. Look closely at the 3D shape on the screen and say its name aloud, such as triangular prism or square pyramid.
  2. Read the question and count carefully: flat surfaces are faces, straight lines where two faces meet are edges, and corners are vertices.
  3. Tap the correct number from the answer choices and check the feedback.
  4. Finish all 10 questions, then try again to beat your own score.

This activity helps your child move from simply naming 3D shapes to describing them like a mathematician. By counting faces, edges and vertices, children learn that a cube has 6 faces, 12 edges and 8 vertices, while a square pyramid has 5 faces, 8 edges and 5 vertices. They also start to notice patterns: every prism has two identical end faces, and a pyramid has one base with triangles meeting at a point. This careful counting builds spatial reasoning, attention to detail and the vocabulary needed later for surface area, volume and geometry in middle school.

Frequently asked questions

What is the difference between a prism and a pyramid?
A prism has two identical parallel faces joined by rectangles, like a triangular prism or cuboid. A pyramid has one base and triangular faces that meet at a single point on top, like a square pyramid.
What age is this 3D shapes activity for?
It suits children aged 8 and above who can already name common 3D shapes. Younger children aged 5 to 7 may enjoy it with an adult helping them point to and count each face, edge and corner.
How can I help my child count edges without missing any?
Ask your child to count in groups: first the edges on the top face, then the bottom face, then the upright ones. Using a real box or a paper model and touching each edge with a finger makes counting much easier.
Is there a rule that connects faces, edges and vertices?
Yes. For these solid shapes, faces plus vertices minus edges always equals 2. A cube gives 6 + 8 - 12 = 2. Older children can use this rule to check whether their counting is correct.
Is this activity free and printable?
The quiz is completely free to play online with no sign-up. You can also print the shape pictures and let your child write the number of faces, edges and vertices beside each one for extra practice.

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Updated 5 Nov 2026