Two and

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Two and Three Dimensional Figures
0406.4.5    Determine if a figure is a polygon
0406.4.21  Recognize two-dimensional faces of
three-dimensional shapes.
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Polygon
A closed, flat shape with straight sides.
Polygons
Not Polygons
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Two-dimensional Figures
A two-dimensional figure has only two dimensions,
it does not create an illusion of depth. It is a
flat figure.
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A shape that takes up space, it is not a plane
figure.
Geometric Solids
cylinder
cube
Rectangular prism
pyramid
cone
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Geometric Face
A flat surface of a geometric solid.
A cube has six faces.
A square pyramid has five faces.
A cylinder has two faces.
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How many faces would these figures have?
Square pyramid
cylinder
cube
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Three-dimensional Figures
A three-dimensional figure has three dimensions.
It has the appearance of depth, it is not just a
flat figure.
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Activities

• Using different geometric solids, put a small
  post it note on each face. The students can then
  count the post it notes to help determine how
  many faces the object has.

• Read The Button Box. When finished, find the
  volume of any small box and try to predict how
  many buttons would fit in the students box.
• Play I Have, Who Has to strengthen vocabulary
  skills and understanding of terms. (cards are on
  last slides)
• Read The Hundred Penny Box. Have students create
  paper boxes that will hold 100 pennies.

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Literature Sources Sir Cumference and the Sword
in the Cone by Cindy Neuschwander, illustrated by
Wayne Geehan Charlesbridge Pub. 2003 The
Hundred Penny Box by Sharon Bell Mathis,
illustrated by Diane and Leo Dillon Puffin Pub.
2006 Mummy Math An Adventure in Geometry by
Cindy Neuschwander, illustrated by Bryan Langdo
Henry Holt Co. 2005
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Grandfather Tangs Story by Ann Tompert, Robert
Andrew Parker illustrator Dragonfly Books
1997 The Adventures of Penrose the Mathematical
Cat by Theoni Pappas Wide World Pub. 1997 Math
for Smarty Pants by Marilyn Burns Little,
Brown Young Pub. 1997 The Button Box by
Margarette S. Reid, Sarah Chamberlain
illustrator, Puffin 1995
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Activities, quizzes, and more
http//illuminations.nctm.org/LessonDetail.aspx?ID
U83 http//www.math.com/school/subject3/lessons/S
3UL1GL.html http//abcteach.comfree/t/three_dimen_
b.pdf http//www.eduplace.com/math/hmtxm/problem/5
/5hmmtx_14_03_ps.pdf http//mathforum.org/alejandr
e/workshops/net.html
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http//www.mathinmotion.com/whalefld.html http//w
ww.numbernut.com/basic/symbol_3d.shtml
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I have a cone. Who has a figure with three
sides?
I have a triangle. Who has the name of two
figures that have the same size and shape?
I have congruent figures. Who has a figure with
five sides?
I have an acute angle. Who has a figure that is a
closed curved shape in which all points are the
same distance from its center.
I have a pentagon. Who has an angle that is less
than 90 degrees?
I have a circle. Who has a figure in which all
sides are the same length.
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I have an equilateral triangle. Who has a figure
with six sides.
I have a hexagon. Who has a triangle with three
sides of different lengths.
I have a scalene triangle. Who has a straight
collection of points extending without end.
I have a line. Who has a figure with eight sides.
I have an octagon. Who has a part of a line with
two distinct endpoints.
I have a line segment. Who has an angle that is
more than 90 degrees.
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I have an obtuse angle. Who has lines that stay
the same distance apart lines that do not cross.
I have parallel lines. Who has a triangle whose
larges angle measures 90 degrees.
I have a right triangle. Who has a quadrilateral
with exactly one pair of parallel sides.
I have a trapezoid. Who has a three dimensional
solid with a polygon as its base and triangular
faces that meet at a vertex.
I have a pyramid. Who has any four-sided polygon.
I have a quadrilateral. Who has an angle that
forms a square corner and measures 90 degrees.
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I have a right angle. Who has a parallelogram
with all four sides of equal length.
I have a rhombus. Who has a round geometric solid
having every point on its surface at an equal
distance from its center.
I have a sphere. Who has a rectangle with all
four sides of equal length.
I have a square. Who has a point of an angle,
polygon, or polyhedron where two or more lines,
rays, or segments meet.
I have a vertex Who has the flat surface of a
geometric solid.
I have a face. Who has a three dimensional solid
with a circular base and a single vetex.