What is a 3D shape?
3D shapes are shapes with three dimensions, such as width, height and depth. An example of a 3D shape is a prism or a sphere. 3D shapes are multidimensional and can be physically held.
Can you find these?
- Tetrahedron (3D triangle with a triangle base)
- Sphere (3D circle)
Cube (3D square)
Square Pyramid (3D triangle with a square base)
Cuboid (3D Rectangle)
Cylinder (3D shape with a circular base)
Triangular Prism (3D shape with identical triangle bases)
Cone (3D triangle with a circular base)
What are the properties of different 3D shapes?
All three-dimensional shapes are different but have three primary properties in common. These main 3D shape properties include:
- Faces: A face is a flat or curved surface on a 3D shape. For example, a cube has six faces, a cylinder has three and a sphere has just one.
- Edges: An edge is where two faces meet. For example, a cube has 12 edges, a cylinder has two and a sphere has none.
- Vertices: A vertex is a corner where edges meet. The plural is vertices. For example, a cube has eight vertices, a cone has one vertex and a sphere has none.
Here are some examples of properties of 3D shapes
Quiz - Click on the image
What is a Net?
A net shows what a 3D shape would look like if it was taken apart and flattened. Take a look at this net. When the box is constructed, it is a 3D shape – a cuboid or a cube. When it is flattened, it becomes a 2D net, which is like an irregular 2D shape.
Must Do: Lets make a 3D net!
Can Do: Geometry Stations
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3D drawing Challenges
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3D Hanging Installation inspired by artist William Metcalfe
Create another 3D net - Remember to Colour in your net before constructing it.