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Geometric Polygons
10th Grade Geometry
Laurie Grodziak
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Click on a polygon to learn more
about it:
Triangle
Quadrilateral
Heptagon
Octagon
Pentagon
Decagon
Hexagon
Dodecagon
Review
Triangle
 Has three sides and vertices
 Sum of interior angles = 180°
 Types of Triangles:
 Right
 Scalene
 Isosceles
 Equilateral
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Quadrilaterals
 Has four sides and vertices
 Sum of interior angles = 360°
 Types of Quadrilaterals:
 Square
 Rectangle
 Parallelogram
 Trapezoid
 Rhombus
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Pentagon
 Has five sides and
vertices
 Sum of interior
angles = 540°
 “Penta” is the Greek
word for “five”
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Hexagon
 Has six sides and
vertices
 Sum of interior
angles = 720°
 “Hexa” is the Greek
word for “six”
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Heptagon
 Has seven sides and
vertices
 Sum of interior angles =
900°
 Also known as
“septagon”
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Octagon
 Has eight sides and
vertices
 Sum of interior
angles = 1080°
 “Octa” is the Greek
prefix for “eight”
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Decagon
 Has ten sides and
vertices
 Sum of interior
angles = 1440°
 “Deca” is the Greek
word for “ten”
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Dodecagon
 Has twelve sides
and vertices
 Sum of interior
angles = 1800°
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Select the Best Answer for the
Following Question:
Which of the following polygons has the sum
of its interior angles equals 720°?
Heptagon
b. Pentagon
c. Hexagon
d. Dodecagon
a.
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Try Again!
You are so close! The sum of a heptagon’s interior angles equals
800°. Click on the arrow to return back to the question!
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to
Question
Try Again!
You are so close! The sum of a pentagon’s interior angles equals
540°. Click on the arrow to return back to the question!
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to
Question
Way to Go!
You selected the right answer. The sum of a hexagon’s interior
angles equals 720°. Click on the arrow to continue through the
lesson!
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Try Again!
This answer is incorrect. The sum of a dodecagon’s interior
angles equals 1800°.Click on the arrow to return back to the
question!
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Question
Awesome Job!
You have successfully learned about the geometric polygons! Click
on any polygon below to return to the beginning of the lesson for
the next student!