1. Geometric Shape
Properties
VERTEX
FACES
EDGES
COMPARING
2-D AND 3-D SHAPES

2. Main Menu
Content
Posttest
End Show

3. Content 1.1
•The Vertex is the point
on our shape where two
Vertex line segments join or
One
meet, or where two lines
intersect (cross). Also
known as a corner point.
•Most objects or shapes
have more than one
vertex, which then are
Vertex called Vertices.
Three
•On a 2-D shape such as
the Triangle, we can see
that it has 3 Vertices.
Vertex
Two

4. Content 1.2
Edge
Two
Edge
• An Edge joins one vertex One
to another and one face to
another, usually in a line
segment.
•Edges have two important
characteristics:
 An edge joins just two
vertices
 An edge joins just two
faces
On the 2-D shape of a
Rectangle we can see that Edge
Edge Three
there are 4 edges, or
Four
otherwise called sides.

5. Content 1.3
•In math we refer to Faces, on
shapes. These are not to be
confused with happy faces, or
mean faces.
•A Face is any of the
bounding surfaces of a solid
figure.
•The face is bounded by a
circuit of edges, an usually
includes the flat region inside
the boundary.
•If we take a look at any 2-D
shape we can see that there is
only one face. When we start This circle
looking at 3-Dimentional has only
shapes we can see many more one face
faces.

6. Content 1.4
•When talking about faces in our
math class, we will most likely not
be referring to 2-D shapes. They in
fact all have one face and there is
no need to count them.
•However now that we are moving
into 3-D objects and shapes we will
in fact be talking about how many
faces each object has.
•Lets take a look at this Cube, and
count the faces it has. YES! Exactly
the cube has 6 faces.

7. Content 1.5
Have Vertices
Have Vertices
Have Edges
Have Edges
Have Many Faces
Only One Face
Can also be rolled, or
Can be rolled (circle)
moved
Cannot be bounced
Can be bounced
Cannot be physically
(sphere)
picked up
Can be picked up and
Have one or more sides.
manipulated.
Have one or more
sides.

8. Content 1.6
Shapes Flow Chart
Shapes
2-D 3-D
One Don’t
Side More Roll
than Roll
one
Circle side Cuboid
Cylinder Cube
Triangle Cone
Rectangle Sphere
Square
Hexagon
Octagon, Shapes Chart
etc,

9. Assessment Time!!
Directions:
•Go to the link below and
take the quiz.
•Vertices are points of
•Once you have finished intersections between
with the quiz please go lines.
down to the next object on •Edges join vertices and
the left hand side titled faces together.
edges, vertices, faces. •The Faces are bounded
While there please take by edges and they are
that assessment as well. usually a flat region.
•Then come back here and
answer my questions that
follow.
Quiz Link

10. How many Vertices does this cube have?
a)4
b)6
c)12
d)8

11. What is the correct number of Edges of this
rectangular prism?
a)12
b)4
c)6
d)8

12. How many Faces does a Pyramid have?
a)10
b)15
c)5
d)4

13. Correct Answer!! Nice Work!!

14. Incorrect Answer! Try Again!

15. Resources
 Wikipedia –polyhedron
http://en.wikipedia.org/wiki/Polyhedron
 Wikipedia- vertex
http://en.wikipedia.org/wiki/Vertex_(geometry)
 For the quiz I used this site-
http://islamiclanguage.net/DIY53d.swf
 I found the shape chart on this site-
http://www.fife-
education.org.uk/inspiration/Images/Inspirationviews/g
eneral/shapes.jpg
 I also used Learn NC for the NCSOS
http://www.learnnc.org/scos/