2. Fourth Grade
• Standard 3.6: Visualize, describe, and
make models of geometric solids (e.g.,
prisms, pyramids) in terms of the number
and shape of faces, edges, and vertices;
interpret two-dimensional representations
of three-dimensional objects; and draw
patterns (of faces) for a solid that, when
cut and folded, will make a model of the
solid.
7. Everybody uses geometry in
everyday life.
Here are a few cool occupations
that deal with geometry.
• Interior designers
• Web designers
• Fashion designers
• Artists
• Architects
• Pool players
• landscapers
8. Geometric shapes are when you take a
regular shape and see what it looks like
from all sides.
A square is a regular flat shape, but when
it is in 3-D, we can see it from all sides and
we have a shape called a cube.
9. • Part of being a good problem solver is
being able to visualize. It is very important
that you can take a flat outline of a shape
and visualize what it will be when it is put
together. These flat pictures of the 3-D
shape are called nets.
10. Nets are 2-dimensional drawings of
3-dimensional shapes
• Discuss the
information on the
right with your
partner.
• When you cut and
then fold the nets,
they form a 3-D
shape.
• There is only one
shape in this net,
what is it?
• What shape will this
make when it is
folded and taped?
11. Let’s think this through
together
When we fold this net up, we will
get what shape?
12. 3 important characteristics
• There are very specific characteristics that
geometric shapes have. They are:
• Faces
• Edges
• Vertices
13. FACES
• Faces are the flat sides that make up the
whole geometric shape.
14. EDGES
• Edges are when two faces come together
and meet. They will form a line. You will
be able to run your finger over the edge of
the geometric shape when it is put
together.
• Can you rub the edge of your desk?
15. VERTICES
• Vertices are the corners or points on a
geometric shape. They form when 3 faces
come together at a certain point. When
you have more than one vertex, the plural
form is vertices.
• This shape has only one vertex:
17. How did you do?
• FACES
• EDGES
• VERTICES
• 5
• 8
• 5
18. Let’s try it out and see!
• 1. Check your materials to make sure that you
have a net, scissors, and tape.
• 2. Examine your net carefully and try to
visualize what geometric shape your flat net will
turn into when you fold it and tape it.
• 3. Cut, fold, and tape your net to form your
shape.
• 4. After you have constructed your shape, write
down the number of faces, edges, and vertices
your shape has.
