The document is a lesson plan on teaching 4th grade geometry concepts including visualizing 3D shapes from their 2D nets, identifying faces, edges, and vertices of shapes, and using nets to construct 3D geometric solids. It provides examples of occupations that use geometry, discusses geometric shapes and their characteristics, includes a net for students to fold into a 3D shape and identify its faces, edges, and vertices. Students are instructed to construct a shape from its net and note the number of each component.

1. Mr. Ledesma’s Math
Extravaganza
Geometry

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.

3. What do you notice?

6. Did you notice anything?
Did you notice any shapes….

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:

16. How many faces?
How many faces, edges, and vertices
do you see?

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.