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Unit 4.
Properties of 3-D shapes.
Activity 1.
Identifying 3-D objects.
1. Write the letter of each 3-D object with the correct name.
Example: a. cyclinder.
rectangular prism
cone
tetrahedron
hexagonal prism
sphere
hexagonal pyramid
octagonal pyramid
cube
octagonal prism
pentagonal pyramid
square based pyramid
cylinder
triangular prism
pentagonal prism
Activity 2.
Building 3-D objects.
Play time!
Using straws, string and jelly tots, see how many of the following 3-D shapes you can
make…
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Activity 3.
Faces, vertices and edges.
vertex (where edges meet)
face (a flat surface)
edge (where 2 faces meet)
Pyramids.
• All pyramids have 1 base.
• All pyramids have triangular faces which meet at 1 vertex (point).
• We name a pyramid according to its base. If the base is a triangle, we name
the pyramid a triangular based pyramid or tetrahedron.
1. Copy and complete the table.
Name the 3-D
Number of
object.
faces.
a.
b.
c.
d.
Shape of each
face.
Number of
edges.
Number of
vertices.
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Activity 4.
3-D objects and nets.
1. Write the name of each 3-D object with the letter of the matching net.
2. Write the name of each 3-D object, shape of the face and name the face angles.
3-D object
Shape of base
Name the angles
________
________
Checked GM
2016
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