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INTRODUCTION
TO POLYGONS
Geometry
5th Grade
Mr. Freedman
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THE DIFFERENT TYPES OF POLYGONS
Click on a
Polygon to get
started or
click the
name below
Triangle
Rhombus
Square
Rectangle
Hexagon
Octagon
Pentagon
Parallelogram
Quick Facts About
Triangles
• A Triangle has 3 sides
• A right triangle has 90 degree angle in
it
• An acute triangle all of its sides are no
greater than 90 degrees
• Obtuse triangles have one angle that
is greater than 90 degrees
• A scalene triangle none of its sides
are equal
• In an Isosceles Triangle at least 2 of
the sides are equal in length
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Quick facts about the
Square
• A square has 4 equal sides
• All of the angles of the square are
equal
• Since all of the angles and sides are
equal it can be referred to as a
quadrilateral
• The area of the square is length *
width
• The perimeter of the square is 4*
the side
• A square is also a rectangle
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Quick Facts About the
Hexagon
•
•
•
•
•
•
the Hexagon is a 6 sided
polygon
When all angles are equal and
all sides are equal it is regular,
otherwise it is irregular
Soap bubbles tend to from
hexagons
The shape of the bee hives
are also Hexagons
The Perimeter of the Hexagon
is the sum of all its sides
Each of the six angles
measures a total of 120
degrees
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Quick facts about the
Octagon
• An Octagon has 8 sides
• Its interior angles
measure 135 degrees
• The Stop signs are in
the shape of an
Octagon
• Octagons symbolize
regeneration
• A regular Octagon has
exterior angles that
measure 45 degrees
• The total of all of the
interior angles totals
1080
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Quick Facts about
the Rhombus
• A Rhombus is a flat
shape
• Has 4 equal straight
sides
• Opposite sides are
parallel
• Opposite angles are
equal
• The infield for
baseball is in the
shape of a rhombus
• All Rhombuses
have 2 diagonals
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Quick facts
about
Rectangles
• Opposite Sides are
parallel
• All angles are right
angles
• Opposite sides have
the same length
• Adjacent sides are
perpendicular
• Each rectangle
contains 2 diagonals
• Each of the
diagonals intersect
in halves
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Quick facts about
the Pentagon
• Has 5 sides
• Exterior angles are
72 degrees
• Interior angles
measure up to 108
degrees
• The sum of all of
the inside angles
totals 540 degrees
• There are no right
angles
• A star has the form
of a pentagon
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Quick facts about
the Parallelogram
• Opposite sides are equal
• Opposite angles are
equal
• A Rectangle is a
Parallelogram
• A Rhombus is also a
Parallelogram
• A square is a
Parallelogram
• The altitude (or height)
of a parallelogram is the
perpendicular distance
from the base to the
opposite side
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Quiz Question
Which polygon has a
total of 5 sides?
A) Pentagon
B)Rhombus
C)Hexagon
D)Octagon
Answer Choice A: This is correct
Great Job A Pentagon has 5 sides
Congratulations you have gotten the
question correct you can now proceed
to the end Click the arrow below to
move to the end
Sorry this answer is incorrect keep
trying the Hexagon has six sides
Please try again click the
arrow to try again
Sorry that answer is incorrect
the Rhombus has four sides
Please keep trying click
the arrow to try again
Sorry that answer that is incorrect
the Octagon has eight sides
Please try again click
the arrow to try again
Congratulations you have completed the lesson on
all of the different Polygons and now should have
a better understanding of the shapes
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