Math > Year 3

Recognise & Describe 3-d Shapes

3D means three-dimensional. 

3D shapes are solid shaped and have 3 dimensions – Length, Width, and Height.

These shapes have vertices, faces and edges.
 

 


 

A face is a flat surface.

An edge is a line between two faces.

vertex(corner) is a point where two edges meet.

 

Let’s learn about the properties of different 3D shapes.


Cuboid

 


 

 

A cuboid is a 3d shape made up of rectangles and squares.

A cuboid has:
 

  • 6 faces: 4 rectangular and 2 square

  • 8 vertices

  • 12 edges


 

Cube
 

unbalanced forces on a box - Clip Art Library
 

A cube is a box-shaped solid object. It is made up of squares.

A cube has:

  • 6 faces (all squared)

  • 8 vertices

  • 12 edges

 

Sphere 
 


 

A sphere is round in shape like a ball. 

A sphere has:

  • One curved face



Cylinder

3D Shape Properties | Geometry - Quizizz

A cylinder is a can-like 3d shape.

A cylinder has 

  • 3 faces 2 circular and 1 rectangular

  • 2 curved edges


 

Cone

A cone is a cap liked 3d shape.

It has 

  • One circular face

  • One vertex

     

Let’s answer some questions:
 

Question 1: Identify the shape that has

  1.   3 faces- 2 circular and 1 rectangular

  2.   2 curved edges
     

Answer:
 


 

A cylinder is a can-like 3d shape. A cylinder has 3 faces i.e. 2 circular and 1 rectangular. A cylinder has 2 curved edges.


 

Question 2:

A cuboid has ____ faces, _____ vertices and _____ edges.
 

Explanation: 

A cuboid is a 3d shape that has

  • 6 faces: 4 rectangular and 2 square

  • 8 vertices

  • 12 edges
     

A cuboid has 6 faces, 8 vertices, and 12 edges.


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