Identifying 3D shapes from 2D shapes
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Geometry - position and direction
Geometry - properties of shapes
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Times tables up to 12 x 12
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Explainer Video
Summary
Identifying 3D shapes from 2D shapes
In a nutshell
3D shapes are made up of vertices (corners), faces and edges. 3D shapes can be regular or irregular.
Regular 3D shapes
For regular 3D shapes, each face is the same shape, which is a regular polygon. Regular 3D shapes look the same from different sides. Below is a table of examples of regular 3D shapes:
SHape Name | Properties | Diagram |
| Cube | Each face is a square. | |
| Regular tetrahedron | Each face is an equilateral triangle. |  |
Irregular 3D shapes
For irregular 3D shapes, different faces can be different shapes. Irregular 3D shapes may look different from different sides. Below is a table of examples of irregular 3D shapes:
Shape Name | Properties | Diagram |
| Cuboid | Each face is a quadrilateral. | |
| Cone | Has a circular base, and then comes to a point at the top. |  |
| Square-based pyramid | Has a square base and triangular sides meeting at a point. |  |
| Triangular prism | Has triangular faces at the ends and rectangular sides. |
FAQs - Frequently Asked Questions
What is a 3D shape?
A 3D shape is a solid object made up of vertices, faces and edges.
What are the properties of an irregular 3D shape?
For an irregular 3D shape, different faces can be different shapes. An irregular 3D shape may look different from different sides.
What are the properties of a regular 3D shape?
In a regular 3D shape, each face is the same shape. That shape is a regular polygon. A regular 3D shape looks the same from different sides.