GEOMETRY
C
D
E
F
G
Had a look
Nearly there
Nailed it!
3-D shapes
You need to learn the names of these 3-D shapes.
Cuboid
Square-based
pyramid
Cube
Cylinder
Tetrahedron
Triangular
prism
Cone
Sphere
Drawing 3-D shapes
Faces, edges and vertices
This square-based pyramid
has 5 faces, 8 edges
and 5 vertices.
The plural of vertex is
vertices.
You can use isometric
paper to draw a 3-D shape.
Face
Vertex
Edge
grade
This shape is made from
4 cubes.
Make sure the isometric
paper is the right way up
 vertical lines down the
page and no horizontal lines.
G
(a) Write down the name of each of these two
3-D shapes.
(i)
(ii)
Cuboid
Tetrahedron
(b) Write down the number of edges on shape (i).
Only about half of students got part (a) correct. You
need to remember the names of the different 3-D
shapes.
For part (b) you can sketch the hidden edges to help
you work out the answer.
This was a real exam question that
caught students out – be prepared!
12
1. Write down the mathematical name for each of
these 3-D shapes.
(b)
(a)
2. Here is a diagram of a prism.
grade
E
(c)
grade
G
(3 marks)
Lia says that E  2  F  V where E is the
number of edges, F is the number of faces and
V is the number of vertices.
Is Lia correct? Explain why.
(3 marks)
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