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🧊 Edges, Vertices, and Faces

Solid shapes have flat faces, straight edges, and pointy vertices. Learn the parts and count them on a cube!

lessons

~15 min

to learn

🔢 Math

subject

Ages 6–12

level

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What you’ll learn

Parts of Solid ShapesName the faces, edges, and vertices of a solid 3D shape.Solid shapes have three kinds of parts. A face is a flat surface, like the flat side of a box. An edge is the straight line where two faces meet. A vertex is the pointy corner where edges meet, and more than one are called vertices.
Counting on a CubeCount the faces, edges, and vertices of a cube and compare it to other solids.A cube has 6 flat square faces, 12 straight edges, and 8 pointy vertices. Not every solid has all three: a sphere is smooth with 0 edges and 0 vertices, and a cylinder has flat circle faces but no pointy corners. Counting the parts helps you tell solid shapes apart.

Questions this course answers

What is a FACE on a solid shape?

A face is a flat surface, like the flat side of a box.

What is an EDGE?

An edge is the straight line where two faces meet.

What do we call the pointy corner where edges meet?

A pointy corner where edges meet is called a vertex.

How many vertices (pointy corners) does a cube have?

A cube has 8 vertices — one at each pointy corner.

Which solid shape has NO edges and NO vertices?

A sphere is perfectly smooth — it has no edges and no vertices.

Grounded in trusted sources

PBS Kids — shapes and geometry
Khan Academy Kids
Britannica Kids
National Council of Teachers of Mathematics

Every Wunder lesson is built from real, reputable sources — never invented.

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