Content code
m1760
Slug (identifier)
polyhedrons-elementary
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Grade 5
Grade 6
Topic
Mathematics
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Title (level 2)
What is a polyhedron?
Title slug (identifier)
definition-polyhedron
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Among the polyhedrons, there are prisms and pyramids.
Read the prisms and pyramids concept sheet for more information.
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Title (level 2)
What is a convex polyhedron and a non-convex polyhedron?
Title slug (identifier)
convex
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Content
Corps
- A polyhedron is convex when no part of its angles point towards the inside of the solid. In other words, it does not contain a hollow or cavity.
- A polyhedron is non-convex (concave) when at least one part of it angles points towards the inside of the solid. In other words, it contains at least one hollow or cavity.
Examples:
| Convex | Non-convex |
|---|---|
 |  |
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Connect different points of the solid with line segments to check if a polyhedron is convex or non-convex.
A polyhedron is non-convex if at least one line segment connecting two points lies outside the solid.
Examples:
| Convex | Non-convex |
|---|---|
 |  |
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Title (level 2)
See Also
Title slug (identifier)
see-also
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Type
Internal
Title
Prisms and Pyramids
Type
Internal
Title
Faces, Edges, and Vertices
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